Types of pots for plants: terracotta to fabric grow bags

Types of pots for plants: terracotta to fabric grow bags

The pot you put a plant in is half the care decision — and most gardening problems trace back to the wrong pot, not the wrong plant. Terracotta wicks moisture away from succulent roots that hate sitting wet. Plastic holds water for thirsty ferns that need consistent moisture. Fabric pots prune roots through their walls so tomatoes build the dense fibrous root system that powers heavy fruit set. This guide walks through six types of pots for plants — the materials, drainage characteristics, weight, sustainability, and which plants each one suits — with the brand examples UK and US gardeners can actually buy.

Match the pot to the plant: Photograph your plant in Growli and we tell you whether terracotta, plastic, glazed ceramic, or a fabric grow bag will give the best results for that species.

How we group the six types

Three filters cover almost every pot decision.

1. Material — drainage and breathability. Porous materials (terracotta, fabric) let water and air pass through their walls; non-porous materials (plastic, glazed ceramic, metal) hold both inside. Porosity is the single biggest variable.
2. Weight and durability. Terracotta and ceramic are heavy; plastic and fabric are light. Terracotta cracks in hard frost; plastic UV-degrades over 5 to 8 years; glazed ceramic frost-protects well; fabric pots last 3 to 5 seasons before fraying.
3. Sustainability. Peat-pot seedling trays compost in the bed; fabric pots reuse for years; plastic pots can be recycled (in some councils) or returned to garden centres; new biodegradable bamboo and coir pots offer compostable alternatives. The UK's gradual phase-out of horticultural peat (confirmed full ban now scheduled for 2030 in retail growing media) is changing what manufacturers stock — peat-free transplant pots are now the default at most garden centres.

We cover each type with a star rating across four factors at the start of each section: drainage, breathability, weight, and durability.

1. Terracotta pots

Drainage: Excellent. Breathability: Excellent. Weight: Heavy. Durability: Cracks in hard frost.

The traditional unglazed clay pot — porous walls, classic terracotta orange-brown colour, the most recognisable pot in horticulture. Fired clay at around 1,000°C produces a wall that wicks moisture from the inside outward, evaporates it from the outside surface, and pulls air into the root zone as it dries. The result: roots stay cooler and drier than in any other pot type.

Best for: Succulents (jade, aloe, echeveria, haworthia), cacti, Mediterranean herbs (rosemary, thyme, sage, oregano, lavender), pelargoniums, citrus, and anything else that prefers to dry out between waterings. The classic succulent soil plus terracotta is a near-bulletproof combination.

Avoid for: Plants that want consistent moisture (ferns, calathea, prayer plants, hydrangeas) — terracotta dries them out faster than you can keep up with.

Frost. Italian and southern Spanish terracotta is fired at lower temperatures and may crack outdoors in UK winters. Look for "frost-proof" or "Impruneta" labels — Tuscan Impruneta pots are fired at 1,000°C+ and certified frost-proof down to 30°C below freezing. UK weatherproof brands include Whichford Pottery and Errington Reay.

Lifespan. Cared-for terracotta lasts decades — many UK estate gardens use 80-year-old pots that were inherited from earlier generations. Bring un-frostproof pots indoors or empty and store inverted from October to March.

2. Plastic pots

Drainage: Good with adequate holes. Breathability: None. Weight: Very light. Durability: 5 to 8 years before UV cracking.

The garden-centre standard. Light, cheap, available in every size from 9cm seedling pots to 90cm patio planters, and produced in colours from nursery black to terracotta-coloured. Plastic walls do not breathe so the soil holds moisture far longer than in terracotta — a 10-inch plastic pot needs watering perhaps twice a week where a 10-inch terracotta wants it three to four times.

Best for: Tropical foliage (monstera, pothos, philodendron, peace lily, calathea), ferns, anything that wants steady moisture, and nursery growing-on. Most houseplants you buy come in a plastic nursery pot — many do not need repotting at all for the first year.

Avoid for: Succulents, cacti, and other plants prone to root rot — the slow drying time makes overwatering far easier.

Recyclability. Most modern plastic pots are polypropylene (PP, recycling code 5) and recyclable through council bin collections or garden-centre take-back schemes (Dobbies, Wyevale, B&Q, and Home Depot all run programs). The traditional carbon-black pots used to be undetectable in council recycling sorting; newer "taupe" or "terracotta-coloured" recycled-content pots scan correctly and have largely replaced black.

Self-watering. Self-watering plastic planters with a reservoir at the base (LECHUZA, Riviera, Click & Grow lines) are a sub-category of plastic. The reservoir buffers 1 to 2 weeks of watering and suits busy households or holiday cover.

3. Glazed ceramic pots

Drainage: Holes-dependent (many decorative ceramics have no hole — drill one or use as a cachepot). Breathability: None. Weight: Heavy. Durability: Cracks if knocked or frozen with wet soil.

Decorative pots — glazed exteriors in every colour and pattern, traditional Chinese and Vietnamese designs through to contemporary matte finishes. The glaze seals both surfaces so glazed ceramic behaves more like plastic for moisture retention while looking dramatically better.

Best for: Statement houseplants in living rooms — fiddle leaf figs, large monstera, rubber plants, dracaena. The visual weight matches the plant.

Drainage hole or cachepot? Two approaches. Drill a hole in the bottom (use a diamond-tipped masonry bit, slow speed, water cooling — modern glazes drill predictably), or use the pot as a "cachepot" — keep the plant in its plastic nursery pot inside the ceramic shell, lift out to water, drain, replace. Cachepot use is the only way to use thrift-store ceramics safely.

Weight. A 12-inch glazed ceramic pot with damp soil weighs 15 to 25 pounds. Move to its final position before filling, and consider plant-pot dollies for any pot you might want to relocate.

Frost. High-fired glazed stoneware (cone 6 to cone 10 firings) is frost-proof. Lower-fired earthenware glazed pots are not. Check the label — frost-proof / freeze-thaw-safe pots are typically labelled as such.

4. Fabric pots and grow bags

Drainage: Outstanding. Breathability: Outstanding. Weight: Very light. Durability: 3 to 5 seasons.

The fastest-growing category in horticulture. Fabric pots — Smart Pot (the original, US), Geopot, and many own-brand UK alternatives — are non-woven polyester or polypropylene fabric stitched into a cylinder with handles. The fabric walls let water drain freely, air diffuse into the rootball, and roots air-prune at the surface.

Why fabric pots work — the air-pruning science. When a root reaches a plastic or terracotta wall it circles, building a tight congested root mass. When a root reaches a fabric wall and the root tip hits open air, it stops growing forward and triggers lateral branching — producing many more fine feeder roots that take up water and nutrients efficiently. Research from the University of New Hampshire (Catherine A. Neal, Department of Plant Biology) documented that plants grown in fabric containers have improved root structure as a result of air root pruning, and that fabric containers reduce root-zone temperatures through evaporative cooling. Cornell University research has shown dissolved oxygen levels in the substrate can be substantially higher in fabric pots than in plastic.

Best for: Tomatoes (a 7-gallon fabric grow bag is the gold standard for one indeterminate cordon), peppers, aubergines, cucurbits, potatoes (15-gallon for a half-bushel of potatoes), and any plant where root mass drives yield. Also strawberries, blueberries (if the substrate is acidic), and patio fruit trees.

Avoid for: Long-term ornamentals in fixed positions — fabric pots dry out fast and need watering nearly daily in hot weather.

Sustainability. Smart Pot brand claims BPA-free and lead-free; Geopot and most UK brands meet similar food-safe standards. Fabric pots last 3 to 5 seasons of outdoor use before fabric weakens.

Brands. Smart Pots (smartpots.com, US-made, the original brand), Geopot (geopot.com, US), and dozens of UK own-brand options at Wickes, B&Q, and online from suppliers like Greenhouse Sensation.

5. Biodegradable peat-free pots

Drainage: Excellent. Breathability: Excellent. Weight: Very light. Durability: Compostable in 6 to 24 months.

The seedling and transplant category. Traditional peat-based "Jiffy" pots and pellets are being phased out across UK retail as part of the wider peat ban (full retail ban scheduled for 2030, with most major garden centres already peat-free in 2026 and all RHS retail outlets selling only "no new peat" plants from January 2026). Replacement materials include coir (coconut fibre), bamboo fibre, recycled paper, cow-manure-pulp, and wood-fibre.

Best for: Seedlings of crops that hate transplant shock — beans, peas, courgettes, squash, sweetcorn, sunflowers — because the pot goes straight into the bed and the root grows through the wall.

Brands. Vegepod (Australia), CowPots (US — cow-manure pulp), Coir Republic and Western Coir (UK coir-fibre), Eco-Pots (Belgium — recycled plastic but technically still in this category for sustainability).

Use note. Plant biodegradable pots so the rim is below the soil surface — exposed pot rims wick water away from the rootball like a candle wick.

6. Wood, metal, and concrete pots

Drainage: Holes-dependent. Breathability: Wood breathes a little; metal and concrete do not. Weight: Heavy to very heavy. Durability: Decades for good wood and concrete; metal rusts.

The architectural and ornamental category — wooden Versailles planters, galvanised metal troughs, concrete and fibre-cement planters, half-barrels.

Wood (oak, larch, cedar). Half-barrels and Versailles boxes. Last 10 to 20 years if the wood is rot-resistant or lined. Wooden half-barrels are a UK allotment classic for blueberries (acidic compost), strawberries, and dwarf fruit trees.

Galvanised metal. Cheap planters and trough designs. Heat up dramatically in summer sun — roots can cook in midsummer. Insulate the inside with bubble wrap or use only for plants that tolerate hot roots (succulents, herbs in part shade).

Concrete and fibre-cement. Architectural finishes for contemporary patios. Fibre-cement is lighter than full concrete and works well outdoors year-round.

Drainage and watering matrix

Note: these are rough guidance for a houseplant or vegetable in active growth; real frequency depends on plant, weather, and soil mix. A succulent in a 4-inch terracotta pot waters once every 2 weeks in summer — much less than a tomato in a fabric grow bag.

How to choose the right pot

Match the plant's water profile. Succulents and Mediterranean herbs — terracotta. Tropical foliage and ferns — plastic or glazed ceramic. Vegetables and fruiting crops — fabric grow bag. Seedlings — biodegradable peat-free.

Match the climate. Outdoors in winter, choose frost-proof terracotta (Whichford, Errington Reay, Impruneta), high-fired glazed stoneware, or recycled plastic. Indoors, all materials work.

Match the position. Patios where you want plants to look as good as they grow — glazed ceramic, wooden Versailles boxes, frost-proof terracotta. Vegetable plots and grow tents — fabric grow bags. Greenhouses and propagators — plastic.

Match your physical strength. A 20-inch glazed ceramic pot with soil weighs over 100 pounds. Anything you might want to move seasonally — choose lightweight plastic or fabric, or budget for a pot dolly.

Match your sustainability principles. Want to phase out plastic? Use terracotta and biodegradable peat-free, accept fabric grow bags last 3 to 5 seasons, and check your local council recycling for plastic-pot take-back schemes. The whole UK garden industry is in transition — the Defra peat phase-out is the most visible piece, but the broader move toward circular materials is well underway.

Try Growli: Open Growli and we'll recommend the pot type and size for your specific plant, climate, and how often you actually water.

Common mistakes

Buying decorative ceramic without a drainage hole and planting directly into it. Roots sit in standing water and rot. Either drill a hole or use the pot as a cachepot with the plant in a nursery pot inside.

Repotting one size too big. A 4-inch plant in a 10-inch pot has soil holding water far longer than the small root system can use. Go up one pot size (typically 2 inches diameter) at a time. See our how to repot a plant guide.

Putting gravel "for drainage" in the bottom of pots. Disproven for decades — gravel creates a perched water table that makes drainage worse, not better. Use a single layer of broken crock over the drainage hole and standard potting mix above. See the science in our best soil for succulents guide.

Leaving terracotta outdoors in hard frost. Even "frost-resistant" terracotta cracks if the soil is wet and freezes solid. Bring un-Impruneta-grade pots indoors, into a sheltered porch, or empty and invert from December.

Using a fabric grow bag indoors without a saucer. Water drains straight through and stains carpets and hardwood floors. Always sit a fabric pot in a deep saucer or tray.

Related articles

• How to repot a plant — step-by-step transplanting
• Best soil for succulents — what to put in your terracotta
• Best fertiliser for indoor plants — feeding pot-grown plants
• Types of soil — matching potting mix to plant
• Types of fertiliser — choosing the right feed
• Pot size calculator — get the right size for your plant
• Indoor plant care — pot, soil, water, light

Reviewed and updated by the Growli editorial team. For questions about anything here, open Growli and ask — or email hello@getgrowli.app.