Vegetable · Brassicaceae
Arugula
Eruca vesicaria subsp. sativa
Get it in the ground during cool weather and you'll be snipping peppery leaves in roughly a month.
Full sun
Every 2–3 days
41–77°F · 5–25°C
40–50 days
Overview
If patience isn't your strong suit, arugula is the speedy, peppery salad green for you. It sits in the cabbage clan right next to broccoli and mustard, and that kinship is exactly where its sharp, mustardy edge comes from. Pop in a short row and you could be picking leaves around 4 to 6 weeks later.
At its core this is a cool-season crop. It really shines through the gentle weeks of spring and fall, the stretch when leaves stay soft and nutty. Force it through hot midsummer and it bolts, throwing up a flower stalk while the leaves turn bitter and tough.
Hardly any green asks so little of you. Arugula is happy in a garden bed or a shallow pot by the window, comes up in just days, and keeps producing as long as you pick the outer leaves and start a fresh row every week or two.
Care
The short version: give it full sun with maybe a bit of afternoon shade, keep the soil evenly moist, and lean on cool weather to hold the leaves mild. Sow it shallow, snip the outer leaves regularly, and kick off a new row every week or two.
Light
Arugula goes for full sun through spring and fall, while the air stays cool enough for it to be content. As soon as the heat shows up, a place with afternoon shade puts the brakes on bolting and holds the leaves milder for a good while longer.
Water
Hold the soil evenly moist and give it a drink every 2 to 3 days when things turn dry. Let it parch and the plant gets frazzled, which nudges it to bolt ahead of schedule and leaves the foliage bitter and tough.
Soil
Set it in rich, well-drained loam with a good helping of organic matter mixed through. A pH sitting between 6.0 and 7.0 is its sweet spot, and ground that stays damp without turning to muck keeps the leaves coming on fast and tender.
Temperature
Arugula loves it cool, somewhere around 41°F and 77°F (5°C to 25°C). A light frost rolls right off it, but heat is its nemesis, driving it to bloom and turning the taste sour.
Humidity
Plain outdoor air is just right, roughly 40% to 70% humidity, so it's not a figure you need to chase. To arugula, steady moisture in the soil counts for far more than whatever's hanging in the air.
Feeding
Mix a nitrogen-rich balanced fertilizer or some compost into the bed when you plant, and that's typically the whole job for a fast grower like this. Start it off in decent soil and that carries the leaves all the way to harvest a few weeks down the road.
Pruning
Grab the outer leaves often and fresh ones keep pushing up from the middle. The moment it begins to bolt and sends up a flower stalk, take the hint and pick whatever remains before the taste sharpens.
Repotting
Arugula gets grown as an annual and resown each season instead of being bumped up to a bigger pot. Growing it in a container? Reach for one at least 4 to 6 inches deep and sow fresh seed every round rather than nursing an old plant along.
Size & spacing
These plants keep things compact, stretching from 8 to 36 inches (20 to 91 cm) tall, where the flower stalk explains that taller end. Thin or set seedlings around 6 inches apart so each has elbow room for a full rosette of leaves.
When to plant
Arugula keeps time by the temperature, not by what the calendar calls summer. Sow it straight into the garden in early spring the second you can dig the soil, then sow once more in late summer for a fall batch, and you'll be snipping leaves roughly a month after each round. Steer clear of the scorching weeks, since the plant bolts almost the moment it pokes up.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: 4-6 weeks before the last spring frost (optional; direct sowing preferred)
- Plant: Direct sow in early spring as soon as soil can be worked, then again in late summer for a fall crop
- Harvest: Leaves harvestable about 4-6 weeks after sowing, mainly in cool spring and fall
Hardiness
USDA hardiness zones: 2–11
Temperature: down to -46°C
Troubleshooting
There aren't many things that go wrong with arugula, and they're easy to spot. Heat-driven bolting tops the list, with a couple of familiar bugs filling out the rest. Find the match below and act fast, back when the leaves are still worth grabbing.
Up shoots a flower stalk while the greens go sharp
What you're seeing is bolting, where the plant flips from growing leaves to setting seed, and warm weather paired with long summer days is what kicks it off. After that, whatever grows back comes in thin and harshly peppery. Cut anything still good while you can, yank the bolted plant, and start over in a cooler spot.
Fix:
- Harvest all usable leaves promptly before they turn bitter
- Pull bolted plants and start a fresh succession sowing
- Move new sowings to a cooler or partly shaded spot
Little round holes dotted all over the foliage
Want to know what makes those pinholes? Flea beetles, tiny dark bugs that spring away the second your hand gets near. The young seedlings get hit hardest of all. Lay floating row cover over the bed starting the day you plant, and harvest those quick leaves before the chewing adds up.
Fix:
- Cover plantings with floating row cover at sowing
- Harvest quickly-maturing leaves before damage accumulates
Gummy huddles of tiny bugs along the fresh shoots
Green or gray groups tucked under the leaves and on soft new shoots point to aphids, and they tend to leave a sticky coating behind. Blast them with a firm jet of water and most let go, then snap off any leaf that's really coated. Helpful bugs in the garden usually handle the rest for you.
Fix:
- Rinse colonies off with a strong spray of water
- Remove and discard heavily infested leaves
Toxicity
Arugula is a salad green through and through, safe for people and pets alike. None of it is toxic, so feel free to grow it around cats, dogs, rabbits, and inquisitive kids. All it wants is to land on your plate.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
Totally fine for cats, since the leaves hold nothing that could hurt them. One nibble might upset a tummy a touch, like any unfamiliar green would, but you've got nothing to genuinely worry about.
Dogs None
There's nothing toxic in it, so a nosy dog can sniff and chew away without any issue. Wolf down a big helping of any leafy green and the gut might run loose for a while, but that's as bad as it gets.
Horses Safe
Arugula holds no threat to horses at all. Like any lush green, it suits them best as a small treat instead of a regular fixture in their feed.
Rabbits Safe
The leaves are safe for rabbits, and plenty of them love that peppery snap. Just keep it to a treat-sized amount mixed in with their everyday greens.
Livestock Safe
Goats, sheep, and cattle can munch arugula with no trouble. It's a healthy leafy green that slots right into a mixed forage.
Birds Safe
Your backyard hens and other birds can peck at the leaves with no worries, and the greens mix a little something new into their meals.
People Safe
People grow arugula precisely so they can eat it. Toss the leaves raw into a salad or let them wilt down in a hot pan, because there's not a single part you need to skip.
Safe to grow around pets and children; the leaves are edible raw.
Varieties
What you'll mostly find for sale is ordinary salad rocket, though a handful of named picks are worth knowing for their taste and how they cope when things heat up.
Astro
Quick to size up with a gentle flavor, and it resists bolting better than the pack, so it's an easygoing pick when the weather warms.
Roquette
Your classic heirloom salad rocket, sporting those deeply cut leaves and the bold peppery kick most folks have in mind for arugula.
Wasabi
Bred for a surprisingly fierce, horseradish-style heat that pops out even next to other rockets.
Companions
Plant near
Bush beans: Beans fix nitrogen and their canopy shades the bed, helping cool-loving arugula stay productive and delay bolting.
Lettuce: Shares arugula's preference for cool, moist conditions and interplants well in the same cool-season bed.
Root crops (beets and carrots): Listed as compatible interplanting partners that use different soil layers, allowing efficient use of cool-season bed space.
How to propagate
Seed is just about the only way arugula gets going, and that's a big reason it's such a simple crop to keep rolling along.
SeedEasy
Direct sow in early spring and again in late summer/fall · Germinates in about 5-7 days; seedlings established within 2-3 weeks
Pretty much the only way folks start arugula is straight from seed. Sprinkle it just under the surface right where it'll grow in early spring, then do it again come late summer for a fall round, and you'll see sprouts in about 5 to 7 days. After the seedlings find their feet across 2 to 3 weeks, thin them to about 6 inches apart, and tuck in a short new row every week or two so the leaves never quit.
Myths
Arugula is naturally bitter and unpleasant to grow.
That sharpness traces back to heat and bolting, not to anything built into the plant. Pick the leaves young while spring or fall stays cool and they come out mild and nutty, nothing like the rough greens folks recall from a summer batch that sat too long.
Arugula is hard to grow from seed.
Honestly? It ranks among the simplest, speediest greens going. Seeds pop up in a matter of days and you can cut leaves in around 40 to 50 days, so it's a great pick for someone just starting out in the garden.