How to Grow Rocket UK
On this page
In the UK, rocket goes in the ground early March to late May, and is ready to harvest 28–60 days after planting.
Timing is the decision that matters most in the UK: sowing early March, and that same window applies across all 4 regions covered here.
The short answer
- Plant
- Early March to late May
- Ready in
- 28–60 days
- Site
- soil pH 6–6.5
- Biggest risk
- Alternaria leaf blight
Core growing advice on this page is checked against named horticultural sources — see References.
Rocket (Eruca vesicaria subsp. sativa)
5 sources cited · Verified
Regional Planting Calendar
| Region | Sow |
|---|---|
| Southern England derived | early March to late May |
| Midlands derived | early March to late May |
| Northern England derived | early March to late May |
| Scotland derived | early March to late May |
Rows marked derived are interpolated between regions our sources do state, because no source we consulted gives a figure for that region specifically. They are deliberately wider to reflect that uncertainty.
Southern England - detail & sources
UK-wide baseline (not yet region-differentiated): Bolts in summer heat; wild rocket is slower to bolt for summer sowings.
Midlands - detail & sources
UK-wide baseline (not yet region-differentiated): Bolts in summer heat; wild rocket is slower to bolt for summer sowings.
Northern England - detail & sources
UK-wide baseline (not yet region-differentiated): Bolts in summer heat; wild rocket is slower to bolt for summer sowings.
Scotland - detail & sources
UK-wide baseline (not yet region-differentiated): Bolts in summer heat; wild rocket is slower to bolt for summer sowings.
Quick Facts
| Factor | Value |
|---|---|
| Soil pH | 6 - 6.5 |
| Optimal growing temp | 15-25°C |
| Minimum survivable temp | 8°C |
| Time to harvest | 28-60 days |
| Soil texture | RHS: "Rocket likes fertile soil that retains some moisture, although wild rocket will also grow well in poorer, drier soil". |
| Drainage | RHS: "A sunny site is ideal for spring and late summer sowings, but for early/mid-summer sowings of salad rocket, it's better to choose a cooler spot in light shade" -- shade is used deliberately to delay bolting. Clemson: "Generally best grown in full sun". |
| Lifecycle | salad rocket is an annual; wild rocket is perennial, living for several years |
| Edible parts | leaves, flowers |
At a Glance
Soil & Growing Conditions
Water: RHS: "Keep the soil moist, watering in dry spells". Clemson: "Provide adequate moisture".
Soil pH range
Span reflects genuine variation between the cited authorities, not a single agreed figure.
Growth Stages
| Stage | BBCH | Notes |
|---|---|---|
| Sowing & germination | 0 | Sow up to 1cm deep, rows 15cm apart; seedlings emerge in only a few days, among the fastest of any salad crop. RHS. |
| Thinning & establishment | 3 | Thin to 15cm apart. RHS. |
| Cropping (cut-and-come-again) | 5 | Ready to pick 4-6 weeks after sowing. Take a few leaves from each plant along the row rather than stripping any one plant bare, which slows its recovery. Salad rocket provides fresh leaves for a month or two depending on temperature. RHS. |
| Bolting (salad rocket) / continued cropping (wild rocket) | 6 | Salad rocket bolts readily in hot weather, which ends the harvest for that sowing -- sow small batches every few weeks to keep supply continuous. Wild rocket, being perennial, keeps producing leaves even after it flowers. RHS. |
Harvest & Storage
When to pick: Neither source gives a physical readiness indicator; both define readiness by elapsed time. RHS: leaves can be picked "as little as a month" after sowing, and growers "usually start harvesting leaves about four to six weeks after sowing". Clemson: arugula "Can be harvested once it reaches maturity about 45 to 60 days after sowing".
Storage
Clemson: "Best when consumed within a week after harvest and can be stored in a plastic bag in the refrigerator". RHS states no storage method.
Diseases
Pests
Rocket, Leaf to Flower
Plan your Rocket planting
When to sow and plant Rocket depends on your own frost dates. Check the UK vegetable planting calendar, or the month-by-month guides that cover Rocket: July, August. To work out where it fits in your beds, sketch your plot in the free Garden Layout Planner.
Growing Rocket in another region
Sowing dates, frost timing and local advice differ by country. Use the guide for where you garden.
References
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Diamondback moth is "the most serious insect pest of brassica crops in South Carolina", leaving a window-pane appearance where the upper leaf surface stays intact. Damage is quantified relative to each other: one cabbage looper does roughly the damage of 5 diamondback moth larvae, and imported cabbageworm about two-thirds of a looper. Cross-striped cabbageworm hatches in masses and can rapidly skeletonise a plant, dropping to pupate just under the soil surface. Cabbage webworm damages buds and growing points, causing lateral budding. Cabbage aphids are commoner in cool autumn weather. Flea beetles are most problematic on mustard and turnips, which lack the protective waxy coating.
5 independent sources are cited for this crop. Where they disagree - soil pH is the clearest case - every figure is preserved rather than averaged into false precision.
Frequently Asked Questions
When should I sow rocket in the UK?
In Southern England, from early March. In Scotland, wait until early March. Treat these as a guide rather than a fixed date — the governing rule is to sow only once frost risk has passed and temperatures are reliably warm enough.
When do I sow rocket?
Sow early March to late May.
How long does rocket take to grow?
Typically 28–60 days, depending on cultivar and growing conditions.
What soil pH does rocket need?
A pH of about 6–6.5. That span reflects genuine variation between the authorities we cite rather than a single agreed figure — the References section lists each source's exact range.
What problems affect rocket?
Our data links 1 disease and 2 pests to this crop. See the sections above for each one and how to manage it.
Plan next season before the problems start
Most of the advice on this page comes down to timing and spacing — sowing at the right moment, rotating beds, and giving plants enough airflow. The UK Garden Planner lays your plot out month by month so those decisions are already made before the season starts.
Get the UK Garden Planner →Instant PDF download · Written for UK growing conditions
How this guide is put together
The growing data on this page — sowing windows, pests, diseases, soil and site requirements — comes from named horticultural sources, listed in References below, checked against RHS and Met Office guidance. An automated pipeline assembles that verified data into the page you're reading: it selects which facts to lead with and builds the surrounding prose and layout. It does not invent a date, a source or a number — where a verified value for a field isn't available, the page leaves it out rather than guessing. A person reviews and publishes each page; nothing goes live unverified.
Last verified 2026-08-06
Where To Go From Here
Take this crop from reading into a written plan for your own beds.
Keep going
Plan the next step
Use the printable SoilCommander planner for your region to turn this guide into sowing dates, bed layouts and weekly garden tasks.