Lacecap Hydrangea
Hydrangea macrophylla
(Thunb.) Ser. Species
- Botanical name
- Hydrangea macrophylla
- Also known as
- Hortensia, Hydrangea, Lacecap Hydrangea
- Family
- Hydrangeaceae
- Genus
- Hydrangea
- Flowering period
- July to September
- Height
- 100–200 cm
- Spread
- 100–250 cm
- Hardiness
- Fully hardy (RHS H5)
- Reference
- World Flora Online
How to grow Lacecap Hydrangea
Planting
Plant in autumn or spring with plenty of organic matter worked in. Avoid dry positions under house eaves or in the root zone of large trees — this plant does not tolerate drought, and the name reflects that.
Pruning
Leave the faded heads on over winter; they protect the buds below. Cut back to the first fat pair of buds in early spring, and take out a couple of the oldest stems at the base each year to keep it renewing.
Propagation
Softwood cuttings in early summer root easily. Take non-flowering shoots and keep them humid until rooted.
Pests and diseases
Vine weevil is a real problem in containers, the grubs eating the roots unseen. Powdery mildew and leaf spot appear in dry or crowded conditions.
Value to wildlife
Lacecap forms have fertile florets in the centre that insects can actually use; mopheads are largely sterile and of little value to pollinators.
Notes
Blue flowers need acid soil and available aluminium. On chalk you can add a colourant, but the honest answer is that it will drift back towards pink and you are better off growing it in a container of ericaceous compost.
Some structured details on this page (such as tolerances, pH and hardiness) come from USDA PLANTS Database (public domain). The written guidance is GardenDecoded's own, researched as described in our editorial policy.
Other names for this plant
These names have all been used for Hydrangea macrophylla but are no longer the accepted name. You may still meet them on old labels, in books, or in nursery catalogues.
Others in Hydrangea
GardenDecoded is an educational gardening reference. Botanical data comes from World Flora Online and GBIF; growing guidance is our own. Always check a plant's toxicity and local invasiveness status before planting, and never eat or apply a plant based on this site alone.