How to Care for Hydrangea macrophylla (Bigleaf hydrangea)

Korean name: 수국

A plant with large, beautiful flower clusters. It has a unique characteristic of changing flower color from blue to pink depending on soil pH.

Key facts

Care Guide

Detailed care guide

Bigleaf hydrangea is loved for its large flower clusters and its flower color, which shifts depending on the soil. With attentive care, you can enjoy showy blooms even indoors.

Watering

Hydrangea needs consistently moist soil to grow healthy. It's especially sensitive to dryness, and if you don't water often enough the leaf tips can turn brown. Overwatering makes the leaves yellow or mushy, so balance the frequency and amount of watering.

Light

Morning direct sun or bright indirect light works well. If light is lacking, the stems can grow leggy and flowering may suffer. Under very strong direct sun, the leaves can scorch, so be careful.

Humidity

This plant likes moderate to high humidity. If indoor air is too dry, the leaves may wilt or their tips may dry out, so mist as needed.

Temperature

Keep it at 13–23°C. Temperatures that are too low or too high can hinder growth. Avoid sudden temperature swings.

A common first-timer mistake

A common mistake is forgetting to water often enough when the soil isn't sufficiently moist. Sticking to a regular watering schedule prevents dried-out leaf tips and wilting flowers.

If you have pets

Hydrangea can cause mild symptoms like vomiting or diarrhea if pets eat it. It's safest to keep it somewhere pets can't chew on it.

Through the Seasons

Hydrangea grows vigorously from spring through summer, so during this period make sure the soil stays consistently moist. Especially during the flowering season, feeding a bloom fertilizer once a month gives you fuller flowers. In winter, cut back on watering a bit and avoid keeping it somewhere too cold.

Common Problems and Fixes

If hydrangea's leaves turn yellow, suspect overwatering or poor drainage. Conversely, brown or dry leaf tips can be caused by dryness. If light is lacking, the stems can stretch out, so make sure it gets enough light.

Repotting and Propagation

Use a moisture-retentive, slightly acidic to neutral soil, and repot once the roots have filled the pot. It's best to repot in spring rather than during the plant's dormant period. Propagation is easy — just cut a healthy stem and plant it in fresh soil.

Who It's Good For

Hydrangea suits anyone who wants to experience showy flowers and its fascinating color shifts. If you can check the soil daily and stay on top of watering and light, anyone can grow a beautiful hydrangea. Plenty of love and attention is really the biggest secret to growing hydrangeas well.

Written by AI from the care facts in this entry. Treat it as a starting point.

Common questions

How often should you water Hydrangea macrophylla?

Keep the soil consistently moist. Sensitive to drought. Roughly every 3 days is the baseline; adjust for the season and the spot it sits in.

Where should you keep Hydrangea macrophylla?

It likes Direct morning sunlight to bright indirect light. You can grow it outdoors. Use Fertile soil with acidic to neutral moisture retention.

Is Hydrangea macrophylla safe around pets?

Mildly toxic, so keep pets from chewing on it.

Is Hydrangea macrophylla good for beginners?

Difficulty: Moderate. Keep it around 13~23°C. Humidity: Moderate to high. Fertilise Flowering fertilizer once a month in spring and summer.