Pink Diamondhydrangea(Hydrangea paniculata " Interhydia " ) offer long - stemmed , large rosiness after pruning in spring . Growing up to 15 fundament tall and wide , Pink Diamond is hardy U.S. Department of Agriculture plant hardiness zones 3 through 8.Before and after pruning this bush , sterilize pruning shear and pruning saw blades by wiping them with a cloth that was dipped in rubbing alcoholic beverage . Use a pruning saw to turn out stem 1/2 inch in diameter or wider . In some areas of the United States , Pink Diamond is invasive .
Pruning for Large Blooms
Pink Diamond hydrangea produce large flush on long stems when most of its stems are pruned in late spring . Dense , cone - mold clusters of white flowers up to 12 in prospicient and 8 inch wide appear on Pink Diamond hydrangea in summer . Over time , the flowers mature to pink , and fade to tan .
Prune the shrub in late bound when most of its leaves have expanded . Select five to 10 of the thickest stem to keep , evenly spaced around the shrub , and prune all the other stems at ground level . trim the remain stem at half their original duration , just above an outward - facing leaf . This also produces a smaller bush . Pink Diamond is a baffling shrub that soon regain from hard pruning . If it is n’t pruned , the bush bears more but small flowers .
Do n’t prune a young Pink Diamond hydrangea for large blooms . Wait until the shrub is three or four year sure-enough .
Pruning After Flowering
Pruning after blossom boost Pink Diamond hydrangea to develop a second flower of blooms . This shrub flowers on this class ’s Sir Henry Wood . Pruning after inflorescence does n’t affect next year ’s showing , but sometimes the shrub blooms again in other fall .
Prune Pink Diamond hydrangea when the flowers are pink and they commence to pass off to tan . Prune crowd and crossing branches where they join the residual of the shrub , and lop one - third of the length of the stay stems .
Pruning to Control Size
former winter or early springtime pruning control the size of Pink Diamond hydrangea and removes branch damaged by severe wintertime conditions . Pink Diamond can grow up to 15 ft grandiloquent and wide , but commonly grow 5 to 10 human foot magniloquent and wide , and tolerates pruning to a smaller size of it .
Before green folio bud appear on Pink Diamond , rationalize numb and damaged stem . Prune dead stem where they bring together the rest period of the bush , and prune damaged stems 2 to 3 inches below the damage area . snip the remaining stems by one-half to command Pink Diamond ’s sizing , just above foliage nodes that face away from the substance of the bush . Leaf lymph gland are small hump on the stem .
Pruning for Cut Flowers
Pink Diamond hydrangea flower make attractive shortened flowers , fresh or dried . Prune Pink Diamond blooms at the fore bases when more than half the individual flush have open up for unused blooms ; or wait until the flowers have faded to tan for peak to make desiccated flower arrangements . attach the stems of pass off bloom with twine and allow them to hang indoors in a cool , airy spot . When the petals are crispy and dry , the bloom are ready to use .
Some gardener prefer to leave faded Pink Diamond bloom on the shrubs over winter , where they look attractive when frosted .
