Arugula is the fastest salad crop in the garden — peppery leaves in a month, and at its sweetest in the cool days of autumn. This guide covers when to plant arugula zone 7 in detail: the sowing, transplanting and harvest windows for USDA Zone 7, plus spacing, soil, water, companions, pests and storage — all based on USDA zone averages and standard published crop ranges.
Zone 7 covers areas with average annual minimum temperatures of 0 to 10°F. The average last spring frost falls in the Mar 15–Apr 1 range and the average first autumn frost in the Nov 1–15 range. These are USDA zone averages, not exact dates for any one garden — check your local extension service and the forecast before planting tender crops outside. The frost-free season runs roughly seven months, from late March into early November,
When to plant arugula in Zone 7
Sow arugula directly from March onwards, in cool soil — it germinates in 7–10 days and is ready to cut in 30–45 days. Sow little and often, every two to three weeks, so there is always a fresh batch. In summer heat arugula bolts quickly, so the spring and autumn sowings are the ones that matter.
The table below puts the whole season on one page. All dates are ranges worked back from the Zone 7 frost averages (Mar 15–Apr 1 last frost, Nov 1–15 first frost) and the crop's published days to maturity (30–45 days). Use the frost date calculator to check the averages for your own area, and confirm them with your local extension service.
| Stage | Zone 7 window | Notes |
|---|---|---|
| Start indoors | — (direct sow; ready in weeks) | Germination takes 7–10 days |
| Direct sow outdoors | Mar–May, and Aug–Oct for autumn leaves | Sow into moist, prepared soil |
| Transplant outdoors | — | Harden seedlings off first |
| First harvest | 30–45 days after sowing, cut-and-come-again | 30–45 days to maturity |
| Autumn / second sowing | Sow Aug–Oct; autumn arugula is the sweetest of the year | Count back from the first frost |
Starting and planting
Sow thinly in rows or broadcast in a bed, thinning seedlings to 6–8 inches apart, in soil with a pH of 6.0–7.0. Arugula tolerates part shade in summer, which slows bolting, and it needs steady moisture — dry plants turn fiercely hot and bolt fast.
Before sowing, fork the bed over, remove weeds and stones, and dig in well-rotted compost. Arugula grows best at a soil pH of 6.0–7.0 — test your soil through your local extension service before amending it.
Spacing, sun and soil
Space plants 6–8 inches apart. Crowded plants compete for light, water and nutrients, stay small, and invite disease through poor airflow, so thin seedlings to the final spacing once they are established.
This crop needs full sun — at least six hours of direct sun a day, and more is better. In Zone 7, a south-facing bed or an open spot away from trees and fences gives the strongest growth and the best flavour.
Soil should be deep, fertile and free-draining, with a pH of 6.0–7.0. Heavy clay improves with compost and organic matter, and raised beds help where drainage is poor.
Watering
Water needs are moderate: aim for steady, even moisture rather than feast-and-famine watering. About an inch of water a week from rain or irrigation is a useful guide in most Zone 7 summers, more in hot, dry spells. Water at the base of the plant in the morning, mulch to hold moisture, and avoid wetting the leaves, which invites disease.
Companion planting
Good companions for arugula include marigolds, basil, onions, lettuce. Planting companions nearby can help with pest confusion, pollination and making the most of bed space — marigolds, for example, are a classic companion across the vegetable garden. The companion planting finder can suggest combinations for your whole bed. Avoid planting arugula where others of the same family (Brassicaceae) grew last year: rotate crops each season to reduce soil-borne disease and pest build-up.
Common pests and problems
Watch for cabbage worms, aphids, flea beetles, slugs. - Cabbage Worms — inspect weekly; hand-pick or wash off with water, and encourage natural predators.
- Aphids — inspect weekly; hand-pick or wash off with water, and encourage natural predators.
- Flea Beetles — inspect weekly; hand-pick or wash off with water, and encourage natural predators.
- Slugs — inspect weekly; hand-pick or wash off with water, and encourage natural predators.
Beyond pests, the main problems are weather-related: a late frost after transplanting, drought at a critical stage, or waterlogged soil after heavy rain. Cover tender plants with frost cloth if a late frost threatens, and mulch to even out soil moisture.
Harvest and storage
Cut leaves when they are a few inches long, taking outer leaves first and letting the centre keep growing — cut-and-come-again picking gives weeks of salads from one sowing. Autumn-sown arugula, maturing in cool weather, is noticeably milder and sweeter than the spring crop.
Arugula is best eaten fresh and keeps for a few days in the fridge. It does not freeze well, so sow small batches often rather than one large one.
The classic Zone 7 mistake with arugula is sowing one big spring batch and expecting summer salads. Arugula bolts in heat — sow small batches in spring and autumn, and give it afternoon shade in warm weather.
Frequently asked questions
When should I plant arugula in Zone 7?
Sow arugula directly from March onwards, in cool soil — it germinates in 7–10 days and is ready to cut in 30–45 days. Work from the table above, using the average last frost (Mar 15–Apr 1) and first frost (Nov 1–15), with 30–45 days to maturity. These are USDA zone averages, not exact dates for any one garden — check your local extension service and the forecast before planting tender crops outside.
How much sun does arugula need in Zone 7?
Full Sun — at least six hours of direct sun a day where possible. Give it the sunniest spot you have.
What soil pH does arugula prefer?
A pH of 6.0–7.0. Test your soil before amending it, and add compost to improve structure whatever the pH. Your local extension service can test a sample and recommend amendments.
What pests attack arugula in Zone 7?
The most common are cabbage worms, aphids, flea beetles, slugs. Inspect plants weekly, hand-pick larger pests, wash small ones off with water, and keep the bed clean and well-spaced so air circulates.
How do I store arugula after harvest?
Arugula is best eaten fresh and keeps for a few days in the fridge. It does not freeze well, so sow small batches often rather than one large one.
See the Zone 7 October planting guide for what else to sow and plant in the same month, browse the full planting calendar, and try the Seed Spacing Calculator to plan your dates. For a related crop, see when to plant mustard greens in Zone 7.