When to Repot Houseplants: The Complete Spring Guide

Spring is repotting season. As temperatures rise and daylight increases, most houseplants begin their active growing phase — making March through May the ideal window for repotting. The extra root growth helps plants recover quickly from the transplant stress. Here's everything you need to know.

Does Your Plant Actually Need Repotting?

Repotting is sometimes done out of habit, but not every plant needs it every year. Look for these signs before you disturb the roots:

Signs it's time to repot:

• Roots are circling the inside of the pot (visible when you tip it out)
• Roots are emerging from drainage holes
• The plant dries out very quickly after watering (root-to-soil ratio is too high)
• The plant is visibly top-heavy and tipping over
• Soil has become compacted and water runs straight through without being absorbed
• No growth for a full growing season despite good light and watering

Signs that can wait:

• Plant is flowering or has recently flowered (wait until blooming is done)
• You just repotted within the past 6–8 months
• The plant looks healthy and is producing new growth

Cacti and succulents often go 3–5 years between repotting. Fast-growers like pothos and spider plants may need it every year.

When Is Spring Repotting?

The ideal repotting window is:

• Northern hemisphere: March to May
• Southern hemisphere: September to November

Wait until you see new growth starting — usually a new leaf unfurling or visible new roots. This signals the plant has entered its growing phase and will recover from transplant stress faster.

Avoid repotting in winter (dormancy) or during a heat wave.

Choosing the Right Pot Size

Going up in pot size is good — but going up too much is harmful. A pot that's much larger than the root ball holds excess moisture the roots can't use, which creates the ideal conditions for root rot.

The rule: Go up one pot size (2–3 cm larger in diameter) only.

If you want to keep a plant at its current size, you can repot into the same pot after trimming the roots slightly and refreshing the soil.

Pot material:

• Terracotta: Breathable, dries quickly — best for cacti, succulents, and anything prone to overwatering
• Plastic/glazed ceramic: Retains moisture longer — better for moisture-loving plants like ferns, calathea, peace lily

Always ensure drainage holes are present. No drainage = eventual root rot.

Choosing the Right Soil

Don't use garden soil for houseplants — it's too dense and compacts over time. Use:

Standard houseplants: Quality potting mix with added perlite (20–30%)

Tropical aroids (monstera, philodendron, pothos): Aroid mix = potting soil + perlite + orchid bark

Succulents and cacti: Well-draining cactus mix or potting mix + 50% perlite/coarse sand

Orchids: Orchid-specific bark mix — never standard potting soil

Ferns and high-humidity plants: Peat-free mix with added coconut coir

Step-by-Step Repotting

1. Water the Day Before

Watering 24 hours before repotting helps the root ball hold together and reduces transplant shock.

2. Prepare Your New Pot

Place a piece of mesh or broken pottery over the drainage hole to prevent soil escaping. Add a 3–5 cm layer of fresh potting mix to the bottom.

3. Remove the Plant

Tip the pot sideways and gently slide the plant out. If it's stuck, squeeze the sides of a plastic pot, run a knife around the inside of a rigid pot, or soak in water to loosen.

4. Loosen the Roots

Gently tease apart the outer root ball with your fingers. Remove as much of the old soil as you can without tearing roots. This is also the time to check for root rot (brown/mushy roots) — trim any you find.

5. Pot Up

Place the plant in the centre of the new pot. The crown (where stem meets roots) should sit 2–3 cm below the pot rim. Fill around the root ball with fresh mix, firming gently.

6. First Watering After Repotting

Water thoroughly until it drains from the bottom, then wait 2 weeks before fertilising. New potting mix contains slow-release fertiliser; adding more immediately can burn the fresh roots.

Post-Repotting Care

• Place in bright indirect light for 2–4 weeks (even if the plant normally prefers direct sun)
• Expect some drooping or yellowing for 1–2 weeks — this is normal transplant stress
• Don't fertilise for 4–6 weeks
• Keep the soil consistently moist (not wet) for the first few weeks to encourage root establishment

If you'd like to propagate cuttings while repotting, this is a great time — see our propagation guide.

Plants That Hate Being Repotted

Some plants do better when slightly root-bound and shouldn't be repotted unless truly necessary:

• Peace Lily — blooms best when pot-bound
• Spider Plant — produces more babies when root-bound
• Orchids — repot only every 2–3 years when roots overflow or media degrades
• African Violets — prefer slightly tight pots

Quick Reference

Plant Type	Repotting Frequency	Pot Size Increase	Soil Mix
Fast growers (pothos, philodendron)	Annually	+2–3 cm	Aroid mix
Slow growers (ZZ, snake plant)	Every 2–3 years	+2–3 cm	Well-draining
Succulents/cacti	Every 3–5 years	+2–3 cm	Cactus mix
Orchids	Every 2–3 years	Same or +1 cm	Bark mix