In short: Coco coir suits most UK garden plants — vegetables, herbs, fruit, ornamentals, and houseplants. It's particularly strong for tomatoes, peppers, strawberries, indoor plants, and seed starting. It's less ideal for true acid-lovers (rhododendrons, blueberries) and for succulents/cacti where its moisture retention is too high.
Coco Coir is remarkably versatile, supporting a wide range of plants from vegetables to ornamental flowers. Here are the best plants to grow in coco coir, categorised by type with specific growing tips for UK gardeners.
Vegetables
Tomatoes
Tomatoes are a natural fit for coco coir. The pH of 5.5–6.5 in our buffered coco coir is perfect for tomato nutrient uptake. Use 60% coco coir, 30% perlite, 10% worm castings. See our full tomato guide.
Peppers and Chillies
Thrive in the same mix as tomatoes. Coco Coir’s warmth retention gives peppers the root temperature they love. Start seeds indoors in pure coco coir from February.
Lettuce and Salad Leaves
Fast-growing salads excel in coco coir’s moisture-retentive environment. Use 70% coco coir, 30% perlite. Ideal for windowsill growing year-round.
Cucumbers and Courgettes
The excellent water retention prevents stress-related bitterness in cucumbers. Use in grow bags or large containers with regular feeding.
Strawberries
Coco Coir keeps fruits clean and dry, reducing rot. The slightly acidic pH suits strawberries perfectly.
Radishes and Spring Onions
Quick crops that germinate and grow rapidly in coco coir’s fine, loose texture. Perfect for introducing children to gardening.
Herbs
Basil, Coriander, and Parsley
These popular kitchen herbs thrive in coco coir’s consistent moisture. Grow on a sunny windowsill in 50/50 coco coir and perlite.
Rosemary, Thyme, and Oregano
Mediterranean herbs prefer drier conditions. Mix coco coir with extra perlite and sand (1:1:1) for fast drainage.
Mint
Mint grows vigorously in coco coir—ideal for containers where you want to control its invasive spread.
Flowers
Petunias and Marigolds
Bedding plants flourish in coco coir’s lightweight, well-draining mix. Perfect for hanging baskets where weight matters.
Geraniums (Pelargoniums)
UK favourites for window boxes. Coco Coir’s drainage prevents the root rot geraniums are prone to.
Sweet Peas
Start seeds in pure coco coir for excellent germination rates. Our seed starting guide covers the method.
Houseplants
Monstera and Pothos
Tropical plants that love coco coir’s moisture retention and aeration. Use 60% coco coir, 40% orchid bark. See our indoor plants guide.
Peace Lilies
Excellent in coco coir. The consistent moisture prevents the wilting these plants are prone to in standard compost.
Succulents
With the right amendments (extra perlite and sand), succulents thrive in coco coir mixes. Read our succulents guide.
Ferns
Ferns love coco coir’s moisture and acidity. Use 70% coco coir, 30% perlite for Boston ferns and maidenhair ferns.
General Growing Tips
- Always use buffered coco coir for best results across all plant types
- Add nutrients from the start—coco coir is not nutrient-rich
- Adjust mixing ratios based on each plant’s moisture preferences
- Water less frequently than with traditional compost
Get Growing Today
One 5kg brick (£16.99) expands to 75 litres—enough for multiple pots, baskets, and seed trays. Our 15kg 3-pack (£46.99, 225L) covers all your growing needs. Free UK delivery included.
Crop-Specific Growing Guides
- Coco Coir for Strawberries: Grow More, Bigger and Sweeter
- Coco Coir for Orchids: The Complete Growing Guide
- Coco Coir for Chillies and Peppers: UK Grow Guide
Related: Coco Coir for Lawns: Does It Work?
Learn more: Why Buffered Coco Coir Matters
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