0How it thrives
Waterhigh
Lightbright indirect
Humiditymedium
Min. temperature-30 °CJanuary
Only very rarely, a little water so the roots don’t dry out completely.
No feeding now.
It can stay outside. Wrap the pot (hessian, polystyrene) and keep it against the house wall, out of the rain.
February
Only very rarely, a little water so the roots don’t dry out completely.
No feeding now.
It can stay outside. Wrap the pot (hessian, polystyrene) and keep it against the house wall, out of the rain.
March
Gentle start: the first small drink once you see buds or new growth and it warms up.
First weak dose at the end of the month if it is actively growing.
Bright spot, east or west window.
Move it somewhere brighter and warmer and end wintering. Get it used to strong sun gradually.
April
Keep evenly moist but never waterlogged.
Liquid feed every 2–3 weeks.
Bright spot, east or west window.
May
Keep evenly moist but never waterlogged.
Liquid feed every 2–3 weeks.
Semi-shaded balcony or east/west window – protect from harsh midday sun.
It flowers next month – once you see buds, don’t move it any more.
June
Keep evenly moist but never waterlogged – more often in heatwaves, preferably in the evening.
Liquid feed every 2–3 weeks.
Semi-shaded balcony or east/west window – protect from harsh midday sun.
It usually flowers now – don’t turn or move it, and log the bloom in your diary!
July
Keep evenly moist but never waterlogged – more often in heatwaves, preferably in the evening.
Liquid feed every 2–3 weeks.
Semi-shaded balcony or east/west window – protect from harsh midday sun.
It usually flowers now – don’t turn or move it, and log the bloom in your diary!
August
Keep evenly moist but never waterlogged – more often in heatwaves, preferably in the evening.
Liquid feed every 2–3 weeks.
Semi-shaded balcony or east/west window – protect from harsh midday sun.
It usually flowers now – don’t turn or move it, and log the bloom in your diary!
September
Keep evenly moist but never waterlogged.
No feeding now.
Semi-shaded balcony or east/west window – protect from harsh midday sun.
It usually flowers now – don’t turn or move it, and log the bloom in your diary!
October
Taper off gradually: very little by the end of the month.
No feeding now.
Bright spot, east or west window.
Move it to its cool, bright winter spot and taper off watering. Log it with one click in the Care hub.
November · now
Only very rarely, a little water so the roots don’t dry out completely.
No feeding now.
It can stay outside. Wrap the pot (hessian, polystyrene) and keep it against the house wall, out of the rain.
December
Only very rarely, a little water so the roots don’t dry out completely.
No feeding now.
It can stay outside. Wrap the pot (hessian, polystyrene) and keep it against the house wall, out of the rain.
Blue on acidic soil, pink on alkaline; only thin out bigleaf hydrangeas in spring.
Smooth hydrangea – what to know
Smooth hydrangea (Hydrangea arborescens) belongs to the Hydrangeaceae family (genus Hydrangea) and is listed in our catalog under “Garden flower”. Its needs – light: bright indirect; water: high; humidity: medium. Frost-hardy to about -30 °C – it can overwinter outdoors in many climates. Rest period: cold winter dormancy. Typical flowering time: June, July, August, September. Easy enough for beginners. For cats: mildly toxic; for dogs: mildly toxic. Keep it out of reach and call a vet straight away if you suspect poisoning. Nobody on Perfect Plants Club has added it to their collection yet – be the first!
All Hydrangea species in the catalog →Detailed toxicity data →
Frequently asked questions
How often should I water Smooth hydrangea?
Generously: keep the soil evenly moist and never let it dry out completely.
How much light does Smooth hydrangea need?
It likes bright but indirect light, such as near an east- or west-facing window.
How cold can Smooth hydrangea get?
Frost-hardy to about -30 °C – it can overwinter outdoors in many climates.
Is Smooth hydrangea toxic to cats and dogs?
For cats: mildly toxic; for dogs: mildly toxic. Keep it out of reach and call a vet straight away if you suspect poisoning.
When does Smooth hydrangea flower?
Typical flowering time: June, July, August, September.
What members’ data shows
When does it really bloom?
No blooms logged yet. If yours flowers, your data will be the first!
Average watering interval
Not enough watering logs yet. Waterings logged in the care hub feed this chart.
Tips and questions about this species
Hydrangea
Care data is for guidance only.
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