How to Repot a Houseplant: Step-by-Step Guide

Repotting is the most intimidating task for new plant parents — but it’s also one of the most important for long-term plant health. Done correctly, repotting gives your plant room to grow, fresh nutrients, and better drainage. Done incorrectly, it can set a plant back by weeks. This step-by-step guide covers exactly how to repot any houseplant without stress.

Signs Your Plant Needs Repotting

• Roots growing out of the drainage holes at the bottom
• Roots circling on the surface of the soil
• The pot is cracking or bulging from root pressure
• Soil dries out within 2–3 days of watering
• Plant is top-heavy and keeps tipping over
• You last repotted more than 2 years ago
• Growth has completely stalled despite regular feeding during the growing season

When to Repot

Spring is by far the best time to repot most houseplants — they’re entering their active growing season and will quickly establish new roots in the fresh soil. Early summer also works well. Avoid repotting in autumn and winter when plants are dormant and roots recover slowly.

If a plant is in urgent distress — roots have cracked the pot, or it’s visibly suffering — repot immediately regardless of the season. A stressed plant in the wrong pot is worse than a repotting in winter.

What You Need

• A new pot — 3–5cm wider in diameter than the current one (see below for exceptions)
• Fresh potting mix appropriate for your plant type
• Perlite to mix in for improved drainage (optional but recommended)
• A trowel or large spoon
• Newspaper or a tray to work on
• Scissors or secateurs (sterilised with alcohol) for trimming roots
• Gloves if you have sensitive skin

What Size Pot to Choose

Go up by 3–5cm in diameter — not more. A pot that’s too large holds excess moisture around roots before they can absorb it, leading to root rot. The common mistake is choosing a pot that “gives the plant room to grow” — but roots grow to fill the pot, not ahead of it.

Step-by-Step Repotting Guide

1. Water 1–2 days before repotting. Moist soil holds its structure and protects roots during removal. Don’t repot into bone-dry soil — it falls apart and leaves roots exposed.
2. Prepare your new pot. Add a layer of fresh potting mix at the bottom — about 3–5cm for a medium pot. No gravel layer needed (this is a persistent myth that actually worsens drainage).
3. Remove the plant from the old pot. Lay the pot on its side and gently squeeze the sides (for plastic pots) or tap the base. Slide the plant out carefully, supporting the base of the stems with your other hand. If it’s stuck, run a knife around the inside edge.
4. Inspect and loosen the roots. Look at the root ball. Gently loosen the bottom and sides with your fingers — this encourages roots to spread into the new soil rather than continuing to circle. Trim any dead, black, mushy, or extremely long circling roots with clean scissors.
5. Place in the new pot. Set the plant at the same depth it was in the old pot — don’t bury the stem deeper than before (this can cause rot). The surface of the root ball should sit 2–3cm below the rim of the pot to allow for watering.
6. Fill with fresh soil. Add potting mix around the sides, gently pressing to eliminate large air pockets. Don’t compact the soil too firmly — roots need some air space.
7. Water thoroughly. Water until it drains freely from the bottom holes. This settles the soil and makes first contact between roots and new growing medium.
8. Rest in a stable spot. Keep the plant out of direct sunlight for 1–2 weeks after repotting. A bright, indirect spot with consistent temperature is ideal. Don’t fertilise for 4–6 weeks — fresh potting mix contains enough nutrients and stressed roots can’t absorb fertiliser efficiently.

Common Repotting Mistakes

• Choosing a pot that’s too large — causes waterlogging and root rot
• Using a pot without drainage holes — always repot into a pot with at least one drainage hole
• Adding gravel at the bottom — this doesn’t improve drainage; it creates a perched water table that keeps the soil above it wetter for longer
• Fertilising immediately after repotting — fresh soil has nutrients, and stressed roots burn easily
• Repotting in winter — slow root growth means the plant can’t establish in the new soil before the cold slows it further
• Reusing old soil — depleted, compacted soil defeats the purpose of repotting

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