Hydrangea serrata are small deciduous shrubs similar to H.macrophylla and usually with lace cap flowers that are flat with small flowers without petals in the centre and showy flowers with petals on the outside. Native of the mountains of Japan and part of South Korea were it grows in mountainous woodland.
The Flower colour of Hydrangea serrata will vary with soil type and most Hydrangea serrata will form round bushes between 1m and 3m tall.
The flowers of the pink Hydrangea serrata varieties will usually go blue in acid soils, but stay pink in alkaline soils. Blue flowers will only remain blue if the soil is acid and there is sufficient Aluminium Sulphate in the compost or soil, if the soil is alkaline the flowers will be pink. White varieties do not change colour with the soil.
If the variety has blue or pink in its name this does not mean that the flowers will come out that colour.
The technical explanation - the blue colour of Hydrangea serrata flowers is determined by the presence of an Anthrocynin Delphinidin 3 - Monoglucoside. The blue colour is caused by the binding of Aluminium Sulphate with the Anthrocynin. This happens under acid soil conditions.
Pruning Hydrangea serrata varieties.
Remove dead heads in spring (late March/early April), and thin out weak and dead stems. You can thin the brown stems to get larger flowers. Do not prune in the autumn as the old flowers give some frost protection to young shoots in early spring. The brown flower heads also look great in winter when covered in frost. If you need to shorten the plant always cut above a bud.
*Please note any hydrangeas with no add to cart button unless otherwise stated are currently out of stock or are only available in limited numbers. Please contact us to check availability 01622 833218 thank you.
Flat dark pink flowers in summer with green leaves blushing in late summer.
Beautiful purple-green foliage and superb autumn colour. Flat umbrella shaped groups of dark pink sterile flowers and a crown of fertile bright pink flowers (red in acid soil) with a bright white centre.
Also known as Hydrangea serrata Maiko. Low growing with small rounded light pink flowers.
Lace-cap Hydrangea with green leaves turning red as they age and white flowers changing to red.
Mountain Hydrangea with delicate light blue flowers turning to a deep crimson.
Dark green leaves and deep blue lace cap flowers.
Lace-cap Hydrangea prolific flowering with bright blue flowers turning sea green with lilac undersides.
Dark green foliage turning red in autumn with semi double blue lace cap flowers.
A pale pink lace-cap Hydrangea blue on acid soils turning burgundy in autumn.
Dark green foliage turning red in autumn and semi double pink lace cap flowers.
Intense flat pink lace cap flowers in summer with dark almost black leaves turning fiery red in autumn. Good to use as dried flowers. **NEW VARIETY FOR 2021**
Lace cap flowers are white punctuated with pink and red with blue in the centre.
A low growing lace cap hydrangea with soft pink flowers.
Mountain Hydrangea Koreana - with pink to blue lace cap flowers in summer.
Large wide dark blue lace cap flowers during summer with light green leaves. **NEW VARIETY FOR 2021**
Lace cap shell pink or pale blue flowers according to soil type.
Lace-cap with double sterile pink flowers turn violet in acid soils. Red autumn colour.
Flat lace-cap intensely pink flowers in summer purplish blue in acid soils.
Lace-cap flowers usually pink.
Also called Hydrangea Preziosa. Blue-pink mop head flowers in late summer.
Lace cap semi double pink flowers turn red with age.
Large flat lace-cap flowers are pink or blue according to soil.
Light green leaves turning red in sun with pink lace-cap flowers.
Blue violet lace cap flowers with green leaves turning red and orange in autumn.
Pale pink or blue lace-cap flowers according to soil.