Vegetable · Brassicaceae
Arugula
Eruca vesicaria subsp. sativa
Sow it while the weather stays cool and you can be snipping peppery leaves in about a month.
Full sun
Every 2–3 days
41–77°F · 5–25°C
40–50 days
Overview
If you are new to growing food, arugula is a lovely place to begin, because it is fast, forgiving, and peppery in the best way. It sits in the cabbage family beside broccoli and mustard, and that gentle family tie is exactly where its mustardy bite comes from. Sow one short row and you can be gathering leaves about 4 to 6 weeks later.
At its heart this is a cool-season crop, so it gives its kindest, most tender leaves through the mild spells of spring and fall. If summer heat catches it, the plant simply bolts, pushing up a flower stalk and turning the leaves bitter, and that is normal rather than a failure on your part.
Hardly any green asks so little of a gardener. Arugula is content in a garden bed or a shallow windowsill pot, it sprouts within days, and it keeps right on giving when you pick the outer leaves and start a fresh row every week or two.
Care
The short version: give it full sun with a touch of afternoon shade, keep the soil evenly moist, and lean on cool weather to hold the leaves mild. Sow shallowly, pick the outer leaves often, and begin a new row every week or two.
Light
Through spring and fall, when the air stays cool, arugula is happiest in full sun. Once the heat sets in, give it a spot with afternoon shade, and that small kindness slows the bolting and keeps the leaves milder for much longer.
Water
Aim to keep the soil evenly moist, watering every 2 to 3 days through dry spells. If it dries out the plant feels the stress, and that nudges it to bolt early and turns the leaves bitter and tough, so steady moisture is the simplest gift you can give it.
Soil
Set it into rich, well-drained loam with a good helping of organic matter worked through. A pH between 6.0 and 7.0 suits it nicely, and ground that holds moisture without staying soggy keeps the leaves coming fast and tender.
Temperature
Arugula is at its best in the cool, somewhere between 41°F and 77°F (5°C to 25°C). It takes a light frost in stride, but real heat is its undoing, sending it to flower and souring the flavor before you would like.
Humidity
Plain outdoor air is all it needs, roughly 40% to 70% humidity, so this is genuinely nothing to fuss over. What matters far more to arugula is steady moisture in the soil rather than the air around it.
Feeding
Work a nitrogen-rich balanced fertilizer or some compost into the bed at planting time, and for a crop this quick that is usually plenty. Start it in good soil and that single feeding will carry the leaves all the way to harvest a few weeks on.
Pruning
Keep picking the outer leaves often, and fresh ones will keep rising from the center to replace them. When the plant begins to bolt and sends up a flower stalk, take it gently as a sign to harvest what remains before the flavor sharpens.
Repotting
Arugula grows as an annual and is resown each season rather than potted on, so there is no repotting to learn. In a container, choose one at least 4 to 6 inches deep and simply start fresh seed each round instead of coaxing an old plant along.
Size & spacing
These are small, friendly plants, reaching from 8 to 36 inches (20 to 91 cm) tall, with the flower stalk making up that taller end. Thin or set the seedlings about 6 inches apart, and each one will have the room it needs for a full, leafy rosette.
When to plant
Arugula follows cool weather rather than the summer on the calendar, and that makes the timing easy to get right. Direct sow it in early spring the moment the soil can be worked, then sow again in late summer for a fall crop, and you can count on cutting leaves about a month after each sowing. Just step around the hottest weeks, when the plant tends to bolt almost as soon as it shows.
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
Arugula rarely gives you much trouble, and what little comes up is easy to read. Bolting in the heat is the main thing to watch, with a couple of common insects making up the rest. Glance at the notes below, match what you see, and step in early while the leaves are still worth gathering.
A tall stalk appears and the leaves start to taste sharp
Take heart, this is just bolting, the natural moment when your plant decides to make seed instead of leaves, and warm weather with long summer days is what nudges it along. The fresh growth that follows comes in slim and bitingly pungent, so it helps to gather every leaf you can use, gently pull the plant, and tuck a new sowing into a cooler corner. You have not done anything wrong.
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 scattered across the leaves
Those neat pinholes come from flea beetles, tiny dark insects that spring out of reach the second you touch the plant, and they go hardest on young seedlings. The good news is that a floating row cover laid over the bed from sowing day keeps them off, and because the leaves grow so fast you can simply pick them before any nibbling adds up. A little damage rarely means losing the crop.
Fix:
- Cover plantings with floating row cover at sowing
- Harvest quickly-maturing leaves before damage accumulates
Soft little bugs gathering on the tender new shoots
Small green or gray clusters tucked under the leaves and along the soft new growth are aphids, and they sometimes leave a faintly sticky film behind. Don't worry, a firm jet of water sends most of them packing, and you can simply pinch off any leaf that is truly covered. Helpful insects in the garden tend to settle the rest for you over time.
Fix:
- Rinse colonies off with a strong spray of water
- Remove and discard heavily infested leaves
Toxicity
Arugula is a salad green right through, safe for people and pets alike, so there is nothing here to worry over. No part of the plant is toxic, which means you can grow it freely around cats, dogs, rabbits, and inquisitive children. All it ever asks is to be eaten.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
You can relax with a cat in the house, since nothing in the leaves can harm one. A curious nibble might unsettle a tummy for a moment, just like any new green, but there is truly nothing here to fear.
Dogs None
A dog is welcome to sniff and chew at this plant without any worry on your part. The most that a big leafy mouthful might do is loosen the stomach briefly, and even that soon passes.
Horses Safe
Arugula holds nothing that could trouble a horse. Like any lush green, it sits best as a small treat rather than a regular part of the daily feed.
Rabbits Safe
Rabbits are quite safe with the leaves, and plenty of them love the peppery snap. Share it in modest amounts beside their everyday greens and they will do just fine.
Livestock Safe
Goats, sheep, and cattle can browse arugula with no harm at all. It is a kindly leafy green that blends comfortably into mixed forage.
Birds Safe
Backyard hens and other birds can peck happily at the leaves, and the greens bring a welcome change to their usual fare.
People Safe
This is a plant grown for the table. The leaves drop straight into a salad or soften into a warm dish, and not a single part needs avoiding.
Safe to grow around pets and children; the leaves are edible raw.
Varieties
Most of the arugula on sale is plain salad rocket, yet a handful of named selections are worth knowing for their flavor and for how kindly they hold up when the weather warms.
Astro
A gentle, quick-growing choice with mild flavor that holds back from bolting longer than most, so it forgives you on the warmer days.
Roquette
The familiar heirloom salad rocket, carrying deeply lobed leaves and the bold peppery snap most people have in mind when they picture arugula.
Wasabi
A selection raised for a striking, horseradish-like heat that stands proudly apart even among the 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
Arugula comes from seed and almost nothing else, and that is a good part of why it stays such an easy, encouraging crop to keep going.
SeedEasy
Direct sow in early spring and again in late summer/fall · Germinates in about 5-7 days; seedlings established within 2-3 weeks
Growing arugula from seed could hardly be simpler, and it is nearly the only way anyone starts it. Scatter the seed shallowly right where it will grow in early spring, then once more in late summer for a fall picking, and you will see it break ground in about 5 to 7 days. As the seedlings settle in over 2 to 3 weeks, thin them to roughly 6 inches apart, and keep tucking a short new row into the bed every week or two so leaves never run out.
Myths
Arugula is naturally bitter and unpleasant to grow.
The sharpness comes from heat and bolting, never from the plant being difficult by nature. Picked young in the gentle cool of spring or fall, the leaves taste mild and nutty, nothing like the harsh greens folks recall from a summer crop that lingered too long.
Arugula is hard to grow from seed.
It is honestly one of the kindest and fastest greens a garden offers. Seeds wake up within days and the leaves are ready to cut in roughly 40 to 50 days, which makes this a wonderfully encouraging first crop for anyone just starting out.