Red Onion Plants
Exquisite taste and colour
Grown by Cameron
Roots' Cotswolds Valley Nursery
Choose your size
Out of stock
Currently out of stock
Currently out of stock
Plant diary
- Flower
- Harvest
Red Onion Plants
- Reliably yielding a prolific crop of delicious red onions, these alliums will reward you with fabulous flavour without much effort.
- With an intense, sharp and utterly moreish onion flavour, red onions work amazingly in salads, pickled in cider vinegar and served in fajitas.
- Mid to late-maturing; harvest your red onions fresh in late summer through to autumn.
- The onions produced are of a good size and an intense colour - no need to pop to the shops anymore!
- Wonderfully easy to grow, these plants are perfect for beginners trying their hand at vegetable growing for the first time.
What to expect
Supplied as
Eventual spread
Tasting notes
Hardiness
Will this grow in my garden?
Can I grow this in a pot?
Yes, red onion plants have shallow root systems and can be grown in wide troughs or 20-centimetre pots.
How big does it get?
Red onion plants produce tubular leaves that reach a height of 30 to 45 centimetres and a spread of 10 to 15 centimetres.
How much sunlight does this need?
The red onion plant prefers full sun.
What kind of soil does this plant prefer?
Red onion plants prefer a light, well-drained, and moderately fertile soil.
How much watering does this plant need?
Red onion plants require consistent watering, needing about 2.5 to 5 centimetres of water per week to keep the soil evenly moist.
Will this plant need pruning?
No, red onion plants do not require pruning.
How hardy is this plant?
The red onion is a hardy plant with an RHS hardiness rating of H4, allowing it to survive winter temperatures down to -10°C. It is hardy through most of the UK, although it may suffer foliage damage in particularly cold inland valleys or at altitude.
The wider garden
Roots' Cotswolds Valley Nursery
Meet Cameron
An experienced hand from seed to harvest
When it comes to veg plants, if Cameron doesn’t know about it? It ain’t worth knowing. They’re one of his horticultural passions and the quality of the produce he – well, produces – at the nursery is testament to that fact. Cameron pairs time-honoured horticultural traditions alongside the very best modern techniques in our fabulous, purpose-built nursery in Evesham. With a background that saw him place at the Grand Finals at the Young Horticultural Awards back in 2022, we’re proud to have someone that really knows his onions.
What customers say about us
We do our best to provide you the best experience ever
Learn from our experts
For growing advice that's clear and easy to follow
What customers say about us
We do our best to provide you the best experience ever
Fighting plastic waste
Delivering fresh from the nursery
Supporting UK growers