Hydrangea

Hydrangeas grow best in moist, well-drained soil rich in organic matter with a pH around 5.5-6.5. Apply compost and a modest spring feeding; flower color responds to soil chemistry only in certain species, and pruning timing depends on whether flowers form on old or new wood.

Sun

Morning sun, afternoon shade

Water

1–2 in/week, deep

Spacing

48 in

First harvest

Shrub; blooms year 1–2

Tips

• Set the root ball level with the soil and space compact shrubs about 48 inches apart, allowing more room for mature large varieties.
• Water deeply to provide about 1-2 inches weekly during dry periods, and mulch without covering the stems.
• Use a balanced shrub fertilizer at the labeled spring rate and avoid heavy nitrogen feeding.
• Keep hydrangea leaves and flowers away from children and pets because they are toxic if swallowed, and watch for leaf spots on wet foliage.
• Identify the species before pruning, cutting old-wood bloomers after flowering and new-wood bloomers in late winter or early spring.