Growing guide
How to grow rocket in Ireland
A few young rocket leaves give a bowl of salad a peppery lift. It needs little space, but a single sowing is not a season-long supply: salad rocket readily flowers as the weather warms. Small, repeated sowings are more useful than one crowded patch. Wild rocket is a different, longer-lived option with a stronger flavour.
On this page
At a glance
- Start with
- Salad rocket seed; wild rocket seed or young plants for a longer-lived crop
- Best position
- Sun or light shade; some summer shade helps in hot weather
When and where to start
Indoor sowing. For earlier leaves, RHS describes February and March sowing in small pots or modules under protection. August and September sowings kept in a greenhouse can provide later leaves. These are protected methods, not evidence of the same outdoor season in every Irish garden.
Direct sowing. Sow salad rocket outdoors from April to early September in RHS’s method. Wait for workable soil and check your variety’s instructions; these are general cultivation dates, not an Irish regional forecast. Sow small batches every few weeks for continuity.
Planting out. Young plants around 10 cm tall can go outdoors from April to early September in suitable conditions. Acclimatise protected plants gradually and use a cooler, lightly shaded spot in hot weather to reduce wilting and bolting.
Planting and spacing
Choose a weed-free strip of soil or a container with drainage holes. Prepare a fine surface so the small seeds can make contact with moist soil. Water a dry seedbed before sowing rather than washing the seeds around afterwards.
For individual salad-rocket plants, use shallow drills no more than 1 cm deep, rows about 15 cm apart, and thin seedlings to about 15 cm apart. Use the thinnings in salads. This is not the same method as a dense baby-leaf mixture harvested younger.
Routine care
Keep seedlings moist while they establish and remove weeds before they crowd the leaves. In summer, light shade can help prolong leaf production. Overcrowding and hot conditions shorten the useful life of salad rocket, so give the next sowing its own small space rather than filling gaps in an ageing crop.
What to watch for
A rising flower stem means the plant is moving towards seed production. Start picking from a younger sowing rather than expecting the old one to return to tender leaf growth. Tiny holes in otherwise healthy leaves can be caused by flea beetles; RHS describes this damage as mainly cosmetic. Check the leaves rather than assuming every hole needs a treatment.
Harvest and storage
Pick young leaves regularly, taking only what you need. In favourable conditions salad rocket may give its first leaves in about a month, but cold soil and slow growth can delay this. Leave enough leaf on a plant to support further growth.
Take leaves close to mealtime for their freshest texture. Salad rocket provides several pickings before flowering ends its useful leaf crop; wild rocket crops for longer and may slow down over winter. Keep sowing young salad plants rather than treating one ageing patch as a permanent supply.
Common questions
Is wild rocket the same as salad rocket?
No. Wild rocket is longer-lived and generally more strongly flavoured. Choose the type deliberately and follow its packet instructions rather than applying a salad-rocket schedule to both.
Why does my rocket flower so quickly?
Salad rocket is naturally short-lived, especially in hot weather. Crowding can hasten flowering. Small repeat sowings and some light summer shade are more useful than relying on one large sowing.
Can I include it in a mixed salad sowing?
Yes: Teagasc includes rocket among salad-leaf mixtures. Harvest a mixture as young leaves; do not treat the spacing for individual mature plants as a dense baby-leaf recipe.