GrowPlants is reader-supported. When you buy through links on this page we may earn an affiliate commission, at no extra cost to you. Product suggestions are pulled from live listings — always check the current label, price and reviews before buying.
The right pot does more than hold soil — it controls drainage, root health, watering frequency and how stable a plant is. This guide explains how to choose pot size and depth, which material suits your plant and setting, why drainage matters most, and the container mistakes that quietly kill plants. For which mix to fill it with, see our soil & growing media guide.
Quick recommendations
Choosing the right pot size
Match the pot to the plant, not the room. A pot 2–5 cm (1–2 in) wider than the current root ball is usually ideal. Jumping to a much larger pot (“overpotting”) surrounds the roots with wet, unused mix that stays soggy and invites root rot. Step up gradually as the plant grows.
- Root space: roots need room but also contact with mix they can dry out; too much empty soil holds water.
- Shallow vs deep: match depth to the root system — deep pots for tap-rooted or tall plants (stability + root run), shallow bowls for succulents, seedlings and shallow-rooted plants.
Drainage: the single most important feature
- Drainage holes are essential for almost every plant — they let excess water escape so roots aren’t left standing in water. If a decorative pot has no holes, use it as a cachepot with an inner nursery pot that does.
- Saucers catch runoff and protect surfaces — but empty them; a pot sitting in a full saucer stays waterlogged.
- A layer of gravel “for drainage” at the base does NOT improve drainage (it raises the saturated zone) — a pot with holes and a good mix is what works.
Pot materials at a glance
| Material | Strengths | Trade-offs | Best for |
|---|---|---|---|
| Terracotta / clay | porous, breathable, heavy & stable, classic look | dries fast, can crack in frost | succulents, Mediterranean herbs, over-waterers |
| Plastic | light, cheap, holds moisture, shatterproof | less breathable, can blow over, degrades in UV | moisture-lovers, nursery growing, hanging pots |
| Ceramic (glazed) | decorative, heavier/stable, retains moisture | heavy, pricier, check for a drainage hole | indoor display plants |
| Fabric | excellent aeration, air-prunes roots, folds flat | dries fast, needs frequent watering | veg, tomatoes, larger outdoor plants (see grow bags) |
Growing in fabric pots specifically? See our best fabric grow bags guide.
Indoor vs outdoor
- Indoor: prioritise a drainage hole + saucer (or a cachepot with a liner), moisture-retentive materials, and weight for stability on shelves.
- Outdoor: favour frost-proof materials (frost cracks cheap terracotta and thin ceramic), UV-stable plastic, and enough weight/width so wind doesn’t topple tall plants.
Stability
Top-heavy plants (indoor trees, tall succulents) need a wide, heavy base — terracotta or glazed ceramic, or a plastic pot weighted at the base. A pot that tips damages the plant and the room.
When to repot: the signals
- Roots growing out of the drainage holes or circling the surface.
- Water runs straight through (the mix has broken down or roots fill the pot).
- The plant dries out unusually fast, or growth has stalled.
- Rule of thumb: most houseplants every 1–2 years, into the next size up. Have fresh mix ready (see soil & growing media).
Common container mistakes
- No drainage hole — the number-one killer; use a cachepot + liner if you love a hole-less pot.
- Overpotting — a huge pot around small roots stays wet and rots them.
- Leaving pots in full saucers — roots sit in water.
- Wrong material for the plant — moisture-lovers in fast-drying terracotta, or succulents in water-holding plastic without care.
- Ignoring frost rating outdoors — cracked pots by spring.
Related guides
- All pots, planters & supports
- Best self-watering pots & planters
- Soil & growing media — what to fill the pot with
- Best fabric grow bags
- Specialist pots: orchid pots · bonsai pots
Quick questions
Do plant pots really need drainage holes? For almost all plants, yes — standing water rots roots. Use a decorative pot without holes only as a cachepot around an inner pot that drains.
What size pot should I choose? Usually 2–5 cm wider than the current root ball. Step up gradually; a much bigger pot holds too much wet soil.
Terracotta or plastic? Terracotta breathes and dries fast (great for succulents and over-waterers); plastic holds moisture and is light (good for thirsty plants and hanging displays).
Related: when & how to repot a plant and how to identify and fix root rot.