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Hydrangea macrophylla ‘Pistachio’ is a compact, reblooming mophead with five-inch scarlet-and-green flowers that appear from spring into fall on three-by-five-foot shrubs.
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Growing up to 10 feet tall with fuzzy leaves that invite touch, H. aspera ‘Sam MacDonald’ produces dark-lilac and soft-pink lacecaps in summer.
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Among white lacecaps, H. macrophylla ‘Lanarth White,’ which blooms from summer to fall, is especially tolerant of poor soil, coastal conditions, and shade.
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H. quercifolia ‘Snowflake’ reaches 8 by 10 feet, with large double-white summer flowers that fade to pink before leaves turn red and purple in autumn.
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Swiss lacecap H. macrophylla ‘Nightingale’ blooms from summer to fall -- deep blue in acidic soil, pinker in alkaline ground.
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The new leaves of H. serrata ‘Kiyosumi,’ a Japanese selection, are rosy maroon; the summer lacecaps are edged in pink.
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H. macrophylla ‘Izu-nohana,’ another Japanese lacecap, features striking pointed summer blooms with double petals in pink to blue, depending on soil acidity.
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Opening white, pale green, or pink in June, the small mopheads of H. serrata ‘Preziosa’ turn burgundy by fall, their maroon-stemmed leaves darkening with them.
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In keeping with its fuzzy, midgreen foliage, H. aspera ‘Kawakamii’ has unusually fringed lacecap flowers in dusty pink, violet, and white from summer to autumn.