Arugula / rocket (rocket) care

Light

Arugula / rocket is a sun-lover and needs the brightest spot in the home to thrive. 4-6 hours of direct sun; tolerates light shade. Indoors that almost always means a south or west-facing windowsill in the northern hemisphere. Plants moved abruptly from low light to direct sun will scorch — acclimate them over 7-10 days by giving a little more sun each day.

Watering

Outdoor arugula / rocket crops want twice-weekly watering. The single best habit is a finger-test before watering — push a finger 3-4 cm into the soil. If it comes back damp, wait a day. If it comes back dust-dry, water deeply at the base of the plant. Consistent moisture prevents bitter leaves.

Soil and pot

Arugula / rocket grows best in rich free-draining loam. Compost-rich; pH 6.0-7.0. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Arugula / rocket sits happiest at around 40-70% (outdoor) humidity and 10-21°C (50-70°F). Outdoor humidity rarely matters. If you keep the room above 10 year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed arugula / rocket sparingly. Light balanced feed at planting. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on arugula / rocket in the Growli community. Each is annotated with the most common cause so you know where to start.

• Bolting and bitter leaves — Heat above 24°C; succession-sow every 2-3 weeks for cooler weather.
• Flea beetles — Pinprick holes; use row cover or sow in cool weather.
• Aphids on flower stalks — Tolerable or rinse off.
• Quick loss to seed — Pick young; leaves over 10 cm get strong.
• Yellow leaves — Nitrogen deficiency or hot soil.

Companion plants

Arugula / rocket pairs well with Lettuce, Spinach, Carrot, and Bean. These are species with similar light and water needs, so you can grow them in the same bed or container without conflict.

Propagation

Direct-sow in succession spring and autumn. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Arugula / rocket is pet-safe. Eruca sativa is not listed by the ASPCA. Safe in moderation; large amounts may cause mild GI upset. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Arugula / rocket deep-dive guides

Every aspect of arugula / rocket care, each with its own calibrated guide:

• Arugula / rocket watering schedule
• Arugula / rocket light requirements
• Best soil mix for arugula / rocket
• Arugula / rocket fertilizing guide
• When to repot arugula / rocket
• How to propagate arugula / rocket
• Arugula / rocket growth rate & size
• Arugula / rocket cold hardiness
• Arugula / rocket temperature & humidity
• Is arugula / rocket toxic to cats & dogs?

Related guides

Arugula / rocket is also known as rocket, salad rocket, and roquette.

• Tomato care — light, water and common problems
• Pepper care — light, water and common problems
• Cucumber care — light, water and common problems
• All 200 plant care guides in the Growli library