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🌸 How to Keep Geraniums Alive in Winter | Winter Gardening Tips UK
🌿 Introduction: Do Geraniums Survive UK Winters?
Geraniums (Pelargoniums) are summer favourites — colourful, long-flowering and perfect for pots, baskets and borders. But despite their popularity, they are not frost hardy in the UK. Even a light frost can:
- blacken leaves
- kill soft stems
- rot the crown
- destroy roots in pots
- completely kill outdoor plants
Luckily, you can easily bring geraniums through winter by overwintering them indoors, in a greenhouse, or by taking cuttings.
Below are the best winter-protection products for keeping geraniums alive through cold UK months.
⭐ Check Out Our Recommended Products
• Frost Protection Fleece
Essential for shielding geraniums in greenhouses or mild outdoor conditions.
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• Cold Greenhouse / Pop-Up Greenhouse
Ideal for storing overwintering geraniums safely out of frost.
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• Multi-Purpose Compost & Small Pots
Perfect for taking cuttings or restarting leggy plants.
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❄️ Are Geraniums Hardy in the UK?
👉 No — Pelargoniums are tender perennials, not hardy geraniums.
Hardy geraniums (cranesbills) survive winter outdoors, but bedding and zonal geraniums need protection.
Tender geranium types include:
- Zonal Geraniums
- Ivy-Leaf Geraniums
- Regal Geraniums
- Scented-Leaf Geraniums (e.g., Rose, Lemon, Mint)
All of these must be protected from frost.
🪴 How to Overwinter Geraniums Indoors (Best Method)
This is the most reliable way to keep geraniums alive in the UK.
1️⃣ Bring Them Indoors Before Frost
Move pots inside when temperatures drop to 5°C or lower.
Best overwintering locations:
- bright porch
- conservatory
- windowsill
- spare room
- heated greenhouse
2️⃣ Reduce Watering
Winter watering should be minimal.
Water only when:
- compost is dry
- leaves start to droop
- stems feel too soft
Overwatering = root rot in winter.
3️⃣ Give Them as Much Light as Possible
Geraniums need good winter light to avoid weak, leggy growth.
Place them:
- next to a south or west-facing window
- under a grow light if indoors is dark
4️⃣ Pinch Off Flowers and Weak Stems
Remove:
- fading flowers
- yellowing leaves
- leggy growth
This keeps the plant compact and healthy for spring.
🌡 Overwintering Geraniums in a Greenhouse
A frost-free greenhouse is excellent for overwintering.
✔ Keep Temperatures Above 5°C
Use:
- greenhouse heater
- bubble wrap insulation
- fleece on cold nights
✔ Reduce Watering Significantly
Geraniums rot easily in cold damp compost.
Water lightly every 3–4 weeks.
✔ Ventilate on Mild Days
Prevents mould and mildew.
🌿 Overwintering Geraniums in Pots Outdoors (High Risk)
This method is only possible in mild areas and requires heavy protection.
You MUST:
✔ Place them against a house wall
✔ Cover with fleece on cold nights
✔ Raise pots off the ground
✔ Keep compost almost dry
Even then, survival is not guaranteed.
🌱 How to Overwinter Geraniums Bare-Root (Old Traditional Method)
Some gardeners store geraniums indoors without soil.
How to do it:
- Lift plant before frost
- Shake soil off the roots
- Store plant upside down in a paper bag or hang it
- Keep in a cool, dark, frost-free room
- Replant in spring
This method saves space and works surprisingly well.
✂️ Taking Cuttings — The Easiest Winter Insurance
Geranium cuttings root easily and ensure you don’t lose your plant.
How to take winter cuttings:
- Snip 8–10 cm pieces of healthy stem
- Remove lower leaves
- Place in small pots with compost
- Keep indoors on a bright windowsill
- Water sparingly
Cuttings usually root in 2–4 weeks.
This is the most reliable way to save your favourite varieties.
💧 Winter Watering Guide for Geraniums
Too much water kills more geraniums in winter than cold does.
Water lightly when:
✔ the compost is dry
✔ leaves droop slightly
✔ stems feel soft
✔ indoors is particularly warm
Do NOT water when:
❌ compost is wet
❌ plants are very cold
❌ the room is poorly ventilated
❌ there is visible mould
🌸 Bringing Geraniums Back in Spring
From March onwards:
- increase watering slightly
- prune back to healthy new growth
- repot into fresh compost
- place outside after risk of frost (usually late April–May)
Geraniums quickly bounce back once warmth returns.
🌼 Common Winter Problems
❌ Yellow leaves
Too much water or not enough light.
❌ Blackened stems
Frost damage — move indoors immediately.
❌ Mould on soil
Poor ventilation or overwatering.
❌ Leggy growth
Lack of light — cut back in spring.
🌸 FAQs
Can geraniums survive frost?
No — frost will kill them.
Can I leave geraniums outside in winter?
Only in very mild winters with fleece protection — not recommended.
Do geranium cuttings survive winter?
Yes — they root well indoors.
When should I bring geraniums inside?
Before temperatures drop below 5°C.
🌼 Conclusion
Geraniums may be tender plants, but with the right protection they overwinter extremely well. Move them indoors, reduce watering, give good light, and take cuttings as backup. Whether you overwinter them whole, bare-root, or as cuttings, you can enjoy strong, healthy geraniums again next year.