How to grow and care for Bigleaf Hydrangea (Hydrangea macrophylla) Indoors

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Hydrangea Plant, Hydrangea macrophylla

Botanical name: Hydrangea macrophylla
Family: Hydrangeaceae
Common names: Bigleaf Hydrangea, Mophead Hydrangea, French Hydrangea, Hortensia, Lacecap Hydrangea

Bigleaf Hydrangea Description

Bigleaf Hydrangea is a spectacular houseplant whose blooms can be white, blue, red, pink, light purple or dark purple where the color is affected by the soil PH.

A PH below 7 (acidic soil) will produce a flower color closer to blue while a PH above 7 (alkaline soil) will produce flowers that are more pink. However, only the pink varieties of Bigleaf Hydrangea can be blued.

Bigleaf Hydrangea is also called Mophead Hydrangea, French Hydrangea, Hortensia, Lacecap Hydrangea among other common names.

The species name macrophylla refers to the large oval saw-edged leaves which are about 4-6 in. long.

Bigleaf Hydrangea Size

Bigleaf Hydrangea is a perennial shrub growing to 7 ft tall by 8 ft broad which bears large globular heads of flowers about 6-8 in. across.

Bigleaf Hydrangea Origin

Bigleaf Hydrangea is native to the seaside habitats as well as mountains in Japan, from Honshu southwards.

Buy beautiful and healthy Bigleaf Hydrangea (Hydrangea macrophylla) from Etsy.

Hydrangea Plant, Hydrangea macrophylla

Bigleaf Hydrangea (Hydrangea macrophylla) Care Indoors

Bigleaf Hydrangea Light Requirements

Bigleaf Hydrangea grows best under bright light away from direct sunlight. Check out this guide on understanding light for houseplants.

How to Water Bigleaf Hydrangea

Water Bigleaf Hydrangea thoroughly during the growing season and maintain the soil moist at all times.

Reduce watering during the cold season to maintain the soil slightly moist as growth is minimal at this time.

Ensure the pot has a drainage hole to avoid getting soggy soil as it can lead to root-rot.

Avoid wetting the blooms of your Bigleaf Hydrangea as it can lead to rotting. Water from the bottom instead. Read more on how to water houseplants.


Temperature for Bigleaf Hydrangea

Bigleaf Hydrangea thrives in cool temperature with a maximum of 160C. The cool temperature prolongs the flowering period. Read more on understanding temperature for houseplants.

Humidity for Bigleaf Hydrangea

Average room humidity is ideal for Bigleaf Hydrangea Plant though it benefits from high humidity.

To raise humidity for your Bigleaf Hydrangea, set the pot on a wet pebble tray. Check out these techniques on how to raise humidity for houseplants.

Fertilizer (Feeding) for Bigleaf Hydrangea

Feed Bigleaf Hydrangea with a water-soluble, phosphorous-rich fertilizer every 2-3 weeks during the growing season.

Withhold feeding during the growth season as growth is minimal. Read more on how to feed houseplants.

How to Prune Bigleaf Hydrangea

Prune Bigleaf Hydrangea by removing dead blooms and leaves to maintain your plant neat and tidy. The blooms can also be cut and preserved in a vase as dry flowers.

Repot Bigleaf Hydrangea and cutback the stems to half their height after flowering is over to encourage new growth and prevent the plant from becoming too large.

Place the Bigleaf Hydrangea in a cool place and reduce watering and continue feeding. Read more on how to prune houseplants.

How to Repot Bigleaf Hydrangea

Repot Bigleaf Hydrangea during the growing season when flowering is over.

To keep Bigleaf Hydrangea small, cutback the stems to half their height and continue to water and feed.

Use a pot one size larger than the previous one for your Bigleaf Hydrangea. Ensure the pot has a drainage hole and the soil is free-draining to prevent the soil from getting soggy as it can lead to root-rot.

Bigleaf Hydrangea Plant (Hydrangea macrophylla) Propagation

Bigleaf Hydrangea Plant can be propagated at the beginning of the growing season from stem cuttings.

How to propagate Bigleaf Hydrangea from stem cuttings

Take stem cuttings of about 4-6 in. from a healthy Bigleaf Hydrangea and ensure each cutting has at least 2 nodes.

Dip the lower cut end of the Bigleaf Hydrangea cuttings in a rooting hormone to hasten rooting.

Insert the Bigleaf Hydrangea cutting in moist free-draining soil and cover the set up with clear polythene to create a greenhouse effect in order to promote rooting.

Place the set up in a warm brightly lit spot and allow the new Bigleaf Hydrangea plants to be well established before transplanting after which routine care can begin.

Hydrangea Plant, Hydrangea macrophylla

Bigleaf Hydrangea (Hydrangea macrophylla) Problems Indoors

Bigleaf Hydrangea yellow and dropping leaves

Bigleaf Hydrangea yellow and dropping leaves are due to underwatering.

Water Bigleaf Hydrangea thoroughly during the growing season and maintain the soil moist at all times.

Reduce watering during the cold season to maintain the soil slightly moist and never allow the soil to dry out completely.

Bigleaf Hydrangea not blooming (flowering)

Bigleaf Hydrangea not blooming (flowering) is due to two possible reasons.

One possible reason for Bigleaf Hydrangea not blooming (flowering) is too little light. Move your Bigleaf Hydrangea to a brighter spot where it will receive bright light but away from direct sunlight.

The second possible reason for Bigleaf Hydrangea not blooming (flowering) is feeding it with a nitrogen-rich fertilizer which promotes foliage growth at the expense of flowers.

Feed your Bigleaf Hydrangea with a water-soluble, phosphorous-rich fertilizer every 2-3 weeks during the growing season but do not feed during the cold season.

Bigleaf Hydrangea pests

Bigleaf Hydrangea pests; spider mite and aphids in hot and dry conditions.

Raise air humidity for your Bigleaf Hydrangea to discourage pest infestation. Check out these techniques on how to raise humidity for houseplants.

Isolate the affected Bigleaf Hydrangea to prevent spread to the other houseplants and treat it appropriately for the pests.

Is Bigleaf Hydrangea (Hydrangea macrophylla) toxic?

All parts of Bigleaf Hydrangea (Hydrangea macrophylla) are toxic to both humans and pets.

If Bigleaf Hydrangea ingested it can cause nausea, diarrhea and vomiting.

Bigleaf Hydrangea produces a sap which can cause dermatitis in sensitive skin. Always wear gloves when handling Bigleaf Hydrangea.

Keep the Bigleaf Hydrangea out of the reach of children and pets to avoid accidental consumption.

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