Some like full sun and others prefer partial sun or even full shade. Add plenty of organic matter (such as compost) around the plant. Then, remove any flowers or buds, as well as any leaves on the lower two-thirds of the stem. To increase the size and quantity of hydrangea blooms, consider a fertilizer with more phosphorus. Learn more about these show-stopping bloomers, including how to grow and care. Rust (Pucciniastrum hydrangea) Like other rusts, hydrangea rust needs two hosts to survive and does not kill either of them. Diseases of hydrangea are typically foliar, although root and flowers may also become infected. The smooth hydrangea ( Hydrangea arborescens) is native to eastern North America. 8. Dozens of species exist. Transplant to the location where you want the hydrangea to grow. Smooth Hydrangeas are. Held upright on sturdy stems, they are well distributed, making a very attractive plant and display. Top reasons to choose Fire Light Tidbit hydrangea for your garden or landscape: - The smallest panicle hydrangea ever - just 2-3'/. To plant a hydrangea tree, start by finding a planting location that receives the right amount of sun and ideally has well-drained soil. Incorrect Pruning. Mature Size: Varies, 6-18 in. Remove the plant from its pot and. serrata is similar in appearance to H. The thin strappy leaves of ornamental grasses make them appealing companion plants for hydrangeas. Take the leaves off the bottom half of the cutting, leaving two to four on the top half. 5. It reaches just 1-2. Bobo ® - dwarf (3’ tall and wide), lacy white flowers turn pink, best color and blooming in cooler climates. This type of hydrangea has a rich history and an even richer appearance. Zones 5-9. Avoid these by spacing plants to allow for air circulation and avoid getting the leaves wet, especially late in the day. The ‘showy’ part of many hydrangea blooms have sterile flower parts that do not provide the pollen necessary to support pollinators. Mountain hydrangea (Hydrangea serrata) is another good hydrangea for pots. Crush the ends of the hydrangea stems as you typically would, until the stems are mushy. petiolaris (Climbing Hydrangea) is a vigorous, large, deciduous climber that clings by aerial rootlets along the stems. For blue blooms, the soil needs to be acidic, with a pH level at or below 5. 5 pH, will favor blue flowers by allowing the hydrangea to absorb more aluminum. In the north, full sun can be tolerated throughout the entire day. The only type hydrangea that can be made into a tree is Hydrangea paniculata. Dip the cutting in rooting hormone. Moist soils that do not dry out are best; do not plant in hot, dry, exposed sites. Its flattened clusters of 2- to 6-inch wide greenish white flowers appear from late spring through summer. Remove leaves from lower half of each cutting and dip the cut end in rooting hormone. The best time to plant a hydrangea is well before the high heat of summer arrives. It comes from two Greek word roots: “hydro,” meaning water, and “angeion,” which means vessel. Dip the cutting in rooting hormone. Leave only the top two leaves and dip the cut end in a rooting hormone before sticking it in damp soil or another potting medium. Beyond flowers, these amazing shrubs offer additional ornamental beauty from neat and inte. In my opinion, the number one reason your hydrangea isn’t blooming is because you have started pruning at the wrong time. Back fill in the sides with soil. 5 and 6. Mulch helps the soil and roots to retain moisture. They are known for their exquisite flowering display, with many offering a season of beautiful blooms that remain attractive into winter. Oakleaf Hydrangea (Hydrangea quercifolia): Native to North America, this hydrangea variety produces foliage that resembles oak trees. Place the mix in the container so that the root ball of the hydrangea fits comfortably and 2–3 inches are left above the top of the root ball for mulch. This type of hydrangea has white blossoms. If the soil is clay based, add gypsum and fork in well. 1-7. 6-. 5, which is ideal for overall nutrient absorption. If you want to create a new hydrangea plant right next to a current one, you can. Reblooming Hydrangea (Hydrangea macrophylla × serrata) Hardy in zones 4-9. Hydrangea is a genus of flowering plants that belongs to the family Hydrangeaceae. Despite the common name “French Hydrangea,” this species is native to Japan. Hydrangea paniculata: This species, which includes Vanilla Strawbery, are often pruned into tree form and are sometimes known as tree hydrangeas, or peegees. 5 will tend to result in blue hydrangea blooms, while above 6. Reliable, incredibly hardy, heat tolerant, this US native hydrangea is perfect for mixed borders, small gardens and patio containers. Add plenty of organic matter (such as compost) around the plant. Bigleaf is divided into two flower types – lacecap and mophead. Hincks, 1868. 99. 99. While the hydrangeas you likely know and love best are blooming shrubs like bigleaf and panicle, this hydrangea type takes the form of a deciduous vine. ; Hydrangea paniculata 'Limelight' grows 6 to 8 feet tall and 5 to 7 feet wide and has a greenish. Specialty formulated hydrangea fertilizer is available, however it is not necessary. Taking cuttings is a good way to clone your favorite panicle hydrangea. Be careful not to cut the roots of the cutting or the mother plant with your spade. Gardening Trees, Shrubs & Vines Shrubs The Best Types of Hydrangeas to Grow in Your Garden Whether you’re looking for the best hydrangea for full sun or all-season color, check out these perfect. Mulch hydrangeas every year in spring, with leaf mould, well-rotted manure, or compost. 14. The fruit matures as a capsule with many dust-like seeds. Bill Stites/EYESWEET INC. Leave 1 to 2 inches between the top of the soil and the rim of the pot for watering. Establish your potted hydrangea in a place that gets morning sun or sustained southern-facing sun for about four hours but keep the plant out of direct sunlight. Secure the main stem with a bamboo stake and use gardening tape or ties to keep it upright and straight. They bloom in early summer on old wood, so prune big-leafy hydrangeas after flowering. Several species are grown in greenhouses and gardens for their showy, usually ball-like flower clusters. For true blue flowers, the hydrangeas need to be grown in acidic soil with a pH of 5. Plant in spring or autumn in moist soil that drains well. This shrub is prized for its long-lasting flower panicles that emerge white but gradually transition to purplish pink. Look for an area in your garden that has good well-draining soil and is located in partial sun. Oakleaf and bigleaf hydrangeas will bloom on old wood and do not require any pruning except to control bloom height or to tidy up the plant. Invincibelle Wee White ® hydrangea is positively ground-breaking: it's the first dwarf 'Annabelle' type hydrangea in the world! This cute little landscape plant ensures that any landscape can enjoy the reliability, low-maintenance, and season-long beauty of hydrangeas. 5), pink or red in neutral to alkaline soils (pH 7. Remove last year’s flowerheads using a pair of the best pruning shears. long (45 cm), packed almost entirely with sterile florets. Its flowers are produced on old wood from last year’s growth. "Maturing to a height of 6' by 6', Tara's cloudlike blooms rest atop elegant oak shaped leaves that take on a rich red hue in fall," says McConnell. Leave around 2 inches of stem below the node. Ailing hydrangea symptoms often start at the leaves, even if the affecting disease is root or insect based. ‘Incrediball’ is a hybrid of ‘Annabelle’ and other Hydrangea arborescens varieties with the goal of stronger stems. Not only are these plants much hardier, growing well from zone 3 to zone 8, they will grow taller, with some reaching as much as 15 feet, but most being around 6 feet tall. Like the mondo grass, it holds its golden color all season long and enjoys the same growing conditions as the hydrangea. In general, however, according to Proven Winners, Hortensia is "an old-fashioned common name for mophead forms of Hydrangea. Learning how to care for hydrangeas starts before the plants are even in the ground. The ‘Berry White’ hydrangea, a type of panicle hydrangea (Hydrangea paniculata), is a newer variety of this popular shrub. Plant Zone: 3-8. Data Source. Selections like 'Annabelle' are stunning and produce huge flower clusters. macrophylla alone), hydrangeas find their way into most gardens in temperate climates. Growing from five to six feet high and wide, this shrub is more compact in nature than other oakleaf hydrangeas. Buy Online. macrophylla Cityline® Paris is one of the Cityline® series of dwarf plants with smaller-stature flowers for Zones 5 to 9. This hydrangea will grow up to 5 feet tall. petiolaris is the most common climbing hydrangea, with large white lacecap flowers in early summer and heart-shaped, dark green foliage that turns butter yellow in autumn. Both spring and fall are usually given as options, since these shoulder seasons generally offer mild weather that works well for plants trying to establish root systems. WATERING: It is important to keep the soil mix evenly moist. You'll need 3- to 5-inch pots with drainage holes, sandy potting mix, rooting hormone, and sterile clippers. Limelight (Hydrangea paniculata. Hardy in zones 3 to 9; takes part sun to sun. Grows best in zones 3-9. Hydrangeas are some of the more beautiful garden shrubs, exhibiting big billowy blooms that come in various shades of pink, blue, purple, white and even green. 2 and 5. Dig a hole twice as deep and as wide as the pot so the plant has enough room to grow. Your hydrangea will need frequent watering in warm weather; check the container for moisture daily. Planting Instructions. Noted for its spectacular flower heads, Hydrangea paniculata 'Phantom' features immense, dense conical flowers, up to 15 in. No flopping, unlike some panicle hydrangeas! As blooms age, they turn pink. Hydrangeas are one of the most popular landscape shrubs in the US. Both are among the most heat-tolerant hydrangeas, although mophead prefers a bit. Hydrangea serrata 'Hydrantea' is easy to grow and makes a lovely addition to ornamental borders. This type of hydrangea has white blossoms that turn light green later in the. But don't think this petite shrub can't make a statement in the garden—it still has a big personality. Other types of hydrangea, including Hydrangea aspera and Hydrangea quercifolia, need only light pruning in spring. There are too many to discuss here. They enjoy more sun than the Mop-head Hydrangeas, so they are a good choice for a sunnier location. How long it will take for your hydrangeas to perk up again depends on how. Even if a hydrangea does bloom on old wood, you don't necessarily have to do anything special to prepare it for winter. Soil. It grows best in part shade in Zones 3 to 9. In some parts of the country, temperatures can fluctuate from -10 to 30 degrees in a week or two. While maintaining its short stature of 3-5’ tall and wide, it really packs a visual punch in the garden. Panicle hydrangea blooms on new wood; it accepts—and even prefers—fairly heavy pruning. To propagate softwood cuttings, follow these steps (as long as it's not a trademarked cultivar): Take a 5-inch stem cutting and remove the lower leaves. FactoryTh/Getty Images. It is a very strong hydrangea and has quickly become one of the favoured shrubs among. Hydrangea flowers: ‘Nikko Blue’ flowers are spherical clusters of spectacular blue or pink florets. To propagate softwood cuttings, follow these steps (as long as it's not a trademarked cultivar): Take a 5-inch stem cutting and remove the lower leaves. They produce white blooms and quickly climb to a height of 80 feet (24 m. Add perlite if the mix feels too thick and heavy. 10. Growing Zones: 4-8. It bears clusters of white flowers in summer that fade to shades of rose or green before turning beige in winter. paniculataThis serves to build up a strong, supportive, woody base while also encouraging abundant new growth for plenty of flowers. As an added bonus, they change. Plant Size: 4-5 feet. It has thick leaves that retain water well and help it get through periods of drought without having to be watered all the time. This diverse group includes two main flower types, large mopheads like those. If your hydrangea shows signs of dryness (like drooping leaves. Held upright on strong stems, the blossoms change color as they mature, gradually turning from soft lime-green to creamy white in late summer and then blush-pink as the. HGTV shares how to plant hydrangeas and hydrangea care tips, plus discover new varieties. Every hydrangea is different. This name comes from the fact that hydrangeas require a lot of water. Gently loosen the roots, then plant using plenty of rich soil. This hydrangea species loves the sun, whereas the rest prefer partial shade. This unique panicle hydrangea revolutionized landscaping across North America. How to Get More Panicle Hydrangea Flowers: Plant panicle hydrangeas in all-day sun or afternoon sun. Hydrangea anomala looks like a plant from a different family altogether, but is a member of the hydrangea family. Hydrangea paniculata or the panicle hydrangea is the sunseeker of the hydrangea family. Like all panicle hydrangeas, 'Sundae Fraise' is tolerant of most soils, regardless of their pH, as long as it's well-drained. Hydrangea care and feeding is fairly simple once you learn some basic rules. To promote fresh, new, vigorous growth on established plants, cut back hard in early spring. Features. Fungal leaf spots and powdery mildew are among the most common hydrangea diseases. Hydrangea paniculata 'Big Ben' grows 6 to 8 feet tall and 5 to 7 feet wide and is valued for having flowers of a deeper pink color. Daylilies. The first defining factor in Hydrangea color is the species. You can use pruning shears or a garden knife to take the cutting. Most types grow in shrub form, however, one is a vine and another is pruned to assume a tree-like appearance. Long-lasting, the blossoms gradually turn rosy-pink as they. The myth, the legend, the plant: 'Limelight' hydrangea. hydrangea. Once the germinated seeds are big enough to handle, transplant them to their spot outside in the fall. Flowers can be used in fresh or dried arrangements. Place in a sunny spot and wait for around 14 days for germination. This can give you an idea of the space you need to allocate in your garden to. The occurrence of these toxins throughout the genus is poorly known, so other species of Hydrangea should be treated with caution and not consumed. Popular named selections: 'Annabelle,' 'Bella Anna,' 'Grandiflora,' 'Incrediball,' 'White Dome'. Another climbing hydrangea is the Japanese false-hydrangea vine, which will grow 15 to 30 feet high. 5 ( alkaline ), the flowers will be pink. When the soil has a pH higher than 6. Wait until a blossom begins to fade and die. This is more common in western climates, like in the mountains west of the United States. The best soil. You can reduce instances of powdery mildew through liberal spacing to promote better air circulation and. Water low and deep with about one inch of water per week. Hydrangea paniculata 'White Diamonds' is a compact, bushy, deciduous shrub boasting glistening white flower panicles in mid-summer. Few blooms provide more showy appeal than hydrangea: long-blooming. Hydrangea Varieties to Grow as Houseplants. Trimming your hydrangea at the wrong time of year can also cause a lack of flowers. This will prevent weeds and maintain soil moisture. Plant in well-draining soil with plenty of organic matter. Watering 5. Click below on a thumbnail map or name for species profiles. shrub sales. The blue flower colour only develops if planted in acid soil. 5. There are several types of white hydrangeas, each needing specific locations and care to perform best. If exploring slow-release granular fertilizer, choose one. Oakleafs are native to the United States, unlike their famous cousins with pink and blue “mophead” flowers, and are tough, cold hardy, and drought resistant. arborescens, and hemlock as its alternate host. From late spring to midsummer, it boasts large, magnificent, conical flower heads, up to 12 in. Water frequently for several weeks afterward, to help the plant establish well. Hydrangea paniculata ‘Phantom’. These are not actually considered hydrangeas though, the plants just closely. Hydrangeas grow best in climates with moderate humidity and temperatures—typically around 50°F to 60°F—under 80°F is best. 7 m) tall and naturally grows as a tidy. 7. Its early bloom time will. Features. Water once the top few inches of soil are dry. It is a dwarf variety and grows up to five feet tall to four feet wide. Dip in suitable cutting gel, place in a pot of propagating mix, and keep moist in a warm shady spot. The shrubs are multi-stemmed and grow in an upright habit. Size: 3 to 6 feet tall and wide Zones: 4-9 14 of 14. Their large size and vibrant flowers combine to create impressive floral displays. With over 70 species of hydrangea, there are compact varieties and ones with scented flowers or fall foliage, and even varieties that flower twice on old and new wood. A. In addition, some H. Avoid cutting the plant in the spring because this may reduce the number of flowers. Add soil around the root system and tamp it down as you go. Hydrangeas are some of the more beautiful garden shrubs, exhibiting big billowy blooms that come in various shades of pink, blue, purple, white and even green. Hydrangeas in general prefer a rich, well-drained soil. Roughly translated, it means water vessel—an accurate description of hydrangeas’ thirst for water. The simplest technique is to water thoroughly (until the. If it feels semi-dry to the touch, water thoroughly until you see the water run out of the bottom of the pot. Up to 20% off. Not only are their flower buds rather cold-hardy, but these types often are valued more for other. dan hinkley collection. Flowers, like clothes, go in and out of style, but white hydrangeas will always dispel gloom in a dark corner. Adding early. 1. Place your hydrangea pot in a sunny spot. The plant reaches 3 to 6 feet tall. Hydrangea L. This climbing vine attaches to structures with rootlike holdfasts, but. Many gardeners don't bother winterizing oakleaf hydrangea (H. Alternatively, choose a large planter or container and place a hydrangea in it alongside some other perennial plants which enjoy similar conditions, before thinning, pruning and transplanting these to new containers once the hydrangea grows. Specially formulated hydrangea fertilizer is available but isn’t really necessary. One of the more decorative varieties, Mirandas can grow up to 50 feet tall and six feet wide. Hydrangea, ( / haɪˈdreɪndʒiə /) [2] commonly named the hortensia, is a genus of more than 70 species of flowering plants native to Asia and the Americas. Fill with potting soil to the bottom of where the plant will sit. Water at the base of the plant slowly until the ground freezes. Planting the hydrangea tree properly is the key to its success. Ornamental grasses. How to say Hydrante in English? Pronunciation of Hydrante with 1 audio pronunciation and more for Hydrante. アジサイ（紫陽花）. Mulching can also help to keep the roots moist. If the infestation persists, apply horticultural oil. Backfill the hole, and cover the branch with garden soil. To plant, set your young hydrangea into the prepared hole. serrata, will react to the pH of your soil as well as the level of aluminum in your soil by changing color. Water Hydrangea ‘Bella Anna’ with soft water: rain or settled. Incorrect pH. botanical name Hydrangea macrophylla ‘Monmar’ PP #25,209. Remove the plant from the container, gently tease the roots and cut away any circled or tangled roots. Hydrangea bushes are a long-time favorite of ornamental gardeners, as well as professional landscapers. The dark green options are exceptional with white hydrangeas, and the variegated green and cream types go well with white, pink and blue hydrangeas, depending on what you have chosen. To keep your Hydrangea blooms blue, simply monitor the pH and adjust it as needed. Prune a new-wood hydrangea in spring, and it will grow new buds and then flower. Make sure to keep your arrangement out of direct sunlight. Cuttings should be three to five inches long and contain at least three sets of leaf nodes. Mulching: Each spring, apply compost, shredded bark or other organic matter around the base of plants. The exception, of course. Bloom on new wood: prune in late winter or early spring. Avoid these by spacing plants to allow for air circulation and avoid getting the leaves wet, especially late in the day. Considered one of the best lacecaps, Hydrangea macrophylla 'Lanarth White' shows off large clusters of white florets faintly brushed with blue or pink. peony collection. A hydrangea tree looks best with one trunk, a trunk that is bare up to where the canopy begins. In-ground Hydrangeas – Winter Protection. Pruning in late spring or early summer after new growth has appeared will remove potential flower buds. (37 cm), atop strong, stiff stems that do not flop. Watering top down will encourage fungal disease, and potentially harm the plant. Mature height is just one to two feet, with no pruning necessary. Add plenty of finished compost and organic matter to the soil to enrich and lighten it. The most prevalent causes of. The water should be evenly distributed at the roots, and never over the top of the plant. Looking across a yard at a bank of hydrangea bushes in full bloom is certainly. The flowers make great cut flowers, fresh or dried. The hybridizers were successful and ended up with a plant with very strong stems that will support their flowers and remain upright. "Hydrangea Shrubs. Blooming from mid to late summer, the glowing blossoms retain their color for a long period before taking on a metallic. Bred in Georgia to handle the heat, compact Hydrangea paniculata Little Hottie® puts on an impressive and outsize flower show even as the mercury rises. Many other, closely related hydrangea species are likewise known for their bountiful, showy, long. Best easy-care hydrangeas Whether it's planting, pruning, watering, or. If it feels semi-dry to the touch, water. The compact habit makes it suitable for both container gardening and. Use your finger to feel into the soil around the base of the plant and check for dryness. Firm the soil in around the rootball. Dip in suitable cutting gel, place in a pot of propagating mix, and keep moist in a warm shady spot. Hydrangeas do best in moist soil and can wilt in hot weather, so keep well-watered during hot spells in summer. Ralph Lee Anderson. Oakleaf hydrangeas thrive in the shade and won't bloom in full sun, while panicle hydrangeas love to soak up the full sun and won't bloom in the shade. Pick the Flower Hue You Want. 4. Height x spread: 120cm x 120cm. 5 will favor more of a pink color. The name ‘hydrangea’ comes from Greek and it means ‘water vessel’. 144 inches. Instead, they grow in a loose, spreading mass of fibers often referred to as a root ball. Trying to change flower color. Remove the plant from its container: Gently tap the sides of the container to loosen the root ball. If space is tight in your yard, you can still enjoy lush hydrangea blooms with a small variety such as Let’s Dance 'Rave' reblooming hydrangea (above), which grows 2 to 3 feet tall and wide. Light: Full sun, partial shade. These levels are affected by soil pH, so on acid soils where the pH is 5. They are easy to grow,. Height and spread: 100cm (39"). Since garden hydrangeas are deciduous shrubs, they. Flare Hydrangea bloom on new wood, so trim as needed in the fall after the flowers fade. Place the cut end in a pot filled with moist potting mix and firm soil around the cutting. Like most potted plants, watering will depend on how fast the soil dries out and if it's in bloom or not. Perhaps the best known of the hydrangeas is the mophead style of Hydrangea macrophylla. Blue Enchantress®. Planting hydrangeas in pots: Use a bagged potting mix rather than garden soil. Prune out from one-third to one-quarter of last year's growth to the base each year to encourage the plant to produce new shoots. They are produced in such great quantities that they literally. It's cold-hardier too, and its leaves turn burgundy in fall. [2] Common names include bigleaf hydrangea, French. Vanilla Strawberry™ Hydrangea Shrub. 3. アジサイ を含み、広義にはこの属をアジサイと総称する [2] 。. Image . 1. Not too long ago, Hydrangea serrata was Hydrangea macrophylla subsp. Water your hydrangeas regularly to keep. Tough, cold-hardy, easy-care, long-lived, it is laden with large, conical, snowy flowers from midsummer to fall. Also called Hydrangea petiolaris, these can grow 30 to 80 feet long. Growing Hydrangea (House Plant) Latin Name Pronunciation: hy-drain'-jah LIGHT: When you receive your new Hydrangea, we recommend that you set it in a window where it will receive 6–8 hours of direct sun. Mature plants also need their moisture levels boosted during the growing season, especially in periods of drought. Most shrub-form hydrangeas sold in North America fall into one of five types: bigleaf, mountain, smooth, panicle and oakleaf. Hydrangeas are relatively drought-tolerant once established, but adding organic mulch to help retain moisture and assist with draining will help. It includes over 70 species of deciduous and evergreen shrubs, as well as a few small. See moreWhat Are Hydrangeas? Blooming in spring and summer, the hydrangea is considered a shrub. It can take up to a year for the soil pH change to take effect and show in the flower color of your hydrangea. Pruning . Choose a location that gets sun in the morning but has some shade during the heat of the afternoon. Providing a long season of interest, Ruby Slippers is a lovely Oak Leaf Hydrangea to be used as a garden focal point or combined with other shrubs or perennials. The flowers are borne above the handsome foliage of bright green, elliptic, slightly serrated leaves. Hydrangea seeds need to be surface sown. The flowers start out white, cream, or green and slowly turn pink, drying and remaining on the plant long after the leaves have fallen. October 14, 2023. 9m tall. If your chosen hydrangea is a variety with large leaves, you can also trim the remaining two. Developed by the US National Arboretum from a cross of ‘Snow Queen’ and ‘Pee Wee’. Compact size fits easily into any landscape. Incrediball is an improved version of the popular Annabelle hydrangea, with strong, sturdy stems that do not flop over and extra-large blooms. Light. But pruning an old-wood hydrangea in spring will remove the existing buds, and it won’t flower that year. chateau™ rose of sharon. Grow in full sun to partial shade in rich, moist soil. 5. You’ll recognize oakleaf hydrangea by its foliage. One of the world’s most popular ornamental flowers conceals a bouquet of biological and biochemical surprises. Fire Light Tidbit ® Panicle Hydrangea Hydrangea paniculata. Low maintenance and easy to grow, this hardy hydrangea can be used as a hedge,. (Image credit: Alamy) Hydrangeas like sunshine, and so choose your sunniest spot to place them in. Several. Climbing Hydrangea (Hydrangea petiolaris) – Hardy to zone 4, climbing hydrangea is a woody vine with white flowers. Exceptionally hardy and reliable, Hydrangea paniculata Fire Light® is a striking deciduous shrub boasting huge flower heads from midsummer to fall. 3-. Blue-flowered florists' plants may show pink. Little Hottie® Hydrangea is a resilient, medium-sized shrub with loaded, white to soft-pink, mophead flowers that bloom in the summer, and provide an interesting contrast to its vibrant, green foliage. Camellias Hydrangea macrophylla, or bigleaf hydrangea, and to a certain extent H. Its flattened clusters of 2- to 6-inch wide greenish white flowers appear from late spring through summer. Remove the plant from its container, and set it in the center of the hole. Hydrangea seeds need to be surface sown. 5 or lower (acidic soil), your Bigleaf hydrangeas will be blue. anomala ssp. But despite their ability to be rather large showstoppers in your yard, how to grow hydrangeas isn’t a question even the novice. Hydrangea anomala petiolaris. Grows up to 36-48 in. How to Prune An Endless Summer Hydrangea. Dip the cut stem end in rooting hormone.