Both appreciate a bit of shade from the afternoon sun and look great in mixed borders or massed together along a woodland edge. Warm weather forces them to reveal their lush foliage and shortly thereafter, big happy flowers emerge in colors reflecting soil pH. Repeat-blooming French hydrangeas, such as 'Blushing Bride' and 'Dooley,' flower on both old and new growth. Mopheads form flowers in spring from buds that formed in late summer. All recommendations for pesticide use are for South Carolina only and were legal at the time of publication, but the status of registration and use patterns are subject to change by action of state and federal regulatory agencies. Deadheading -- the removal of old, spent blooms -- improves the French hydrangeas' appearance during flowering, and it is often the only pruning required if the shrubs aren't overgrown. For planting, dig a large hole approximately two feet across and one foot deep. A: Mophead or French hydrangeas (Hydrangea macrophylla var. Deadheading is the removal of old flowers. The flower heads of mopheads are large and spherical, while lacecaps have small flat-headed flowers encompassed by bigger flowers. A: Mophead or French hydrangeas (Hydrangea macrophylla var. Hydrangea macrophylla ‘Veitchii’ is a compact, lacecap hydrangea with glossy leaves and small blue flowers ringed with large white florets which mature to pink. To figure out the best time to prune your hydrangea, start by identifying the type of hydrangea … It also produces white, pink and purple flowers. Pruning bigleaf hydrangeas. Ideally, avoid pruning big leaf hydrangeas after August 1 st to avoid inadvertently removing flower buds for the next season. French hydrangeas (Hydrangea macrophylla), also called bigleaf hydrangeas, produce orb-shaped clusters of small flowers in pink, blue or white. So its very disappointing when hydrangeas dont bloom for a season. Some say this encourages these varieties to produce larger flowers and sturdier stems. In this case, forewarned is forearmed. However, it is easiest to prune them in the late winter or early spring, because all of the leaves will have fallen off and you will be able to see and access the branches easily. They are hardy in U.S. Department of Agriculture plant hardiness zones 6 through 10, where they are deciduous except in areas with the mildest winters. Luckily, deadheading hydrangeas doesn't prune off old wood; another way to say it is it doesn't prune off the buds that developed last year and thus this year's flowers. Pruning bigleaf hydrangeas. Previously, she owned her own business, selling handmade items online, wholesale and at crafts fairs. Prune oakleaf hydrangea flowers by using sterilized pruning shears. Along with gorgeous flowers, oakleaf hydrangeas also provide spectacular fall color and attractive exfoliating bark in winter. A hydrangea tree is in fact a panicled or PG hydrangea (Hydrangea paniculata) specially pruned to take on a treelike shape. Hydrangea (Hydrangea macrophylla), sometimes called French hydrangea, is a large shrub with beautiful masses of color. Watch Monty’s tips for pruning different types of hydrangea … How to prune hydrangeas. While it’s generally not recommended to move woody ornamental shrubs in the summer, I have found that hydrangeas are quite forgiving as long as they receive plenty of water and are shaded from harsh summer sun. In addition to encouraging hydrangeas to produce more flowers, pruning these shrubs each year helps keep them healthy if they get damaged by weather and allows you to shape them however you like. When you’re pruning the old branches off of a PeeGee, snip it above the little bump, that is the ‘bud’ on the branch, and this is where the new growth and new branch will sprout out. In order to prune back your mophead hydrangeas the right way, you should only prune the older stems or the dead flowers in the middle of summer, ideally before the month of August. 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