GrowSabzHow to grow arugula in pots
Also called Rocket, Garden Rocket, rocket, garden rocket · Eruca vesicaria
ارگولا
- ☀️ Sunlight
- 4–6hours daily
- 💧 Water
- 0.3 Levery 2 days, 5 L pot
- 🌡️ Ideal temp
- 10–20°C
- 🪴 Min pot
- 5 L15 cm deep
- 🧺 Harvest
- 20–40days from sowing
- ⚖️ Yield
- 0.4 kgper 20 L pot
Arugula is one of the fastest things you can grow — roughly 30 days from sowing to harvest. That makes it forgiving of mistakes, because a failed sowing costs you weeks rather than a season, and it's a good crop to slot between slower ones.
Short answer
Grow arugula in a 5 litre container at least 15 cm deep, watering about 500 ml per 10 litres of soil every 2 days, and keep temperatures between 10 and 20 °C. First harvest comes 20–40 days after sowing.
Where to plant it
What size pot does arugula need?
5 litres and 15 cm deep is the realistic minimum for a single plant. Pick a container below to see what changes.
| Container | Minimum size | Depth | Notes |
|---|---|---|---|
| Pot | 5 L | 15 cm | Good for small spaces and continuous harvest. |
| Grow bag | 5 L | 15 cm | Fabric bags provide good aeration. |
| Open ground | — | 15 cm | Plant in rows or broadcast seeds for a larger crop. |
| Raised bed | 10 L | 20 cm | Excellent for soil control and drainage. |
Watering
How often should you water arugula?
Every 2 days through the growing season, at about 500 ml per 10 litres of soil — daily in hot weather, every 3 days when it turns cool. Water in the early morning. Drip irrigation or gentle watering at base works best.
Too little water
- wilting
- bitter leaves
- bolting
Too much water
- yellowing leaves
- stunted growth
- root rot
Avoid: overhead watering in hot weather; letting soil dry out completely.
Climate
Can you grow arugula where you live?
No hardiness zone needed — compare your actual temperatures against the plant's own limits.
| Ideal range | 10 – 20 °C |
|---|---|
| Survives | -5 – 28 °C |
| Germinates above | 5 °C — best at 15 °C, about 5 days |
| Flowers drop | above 25 °C |
| Sunlight | 4–8 hrs/day, best 6 |
| Frost | Low sensitivity |
The flower-drop thresholds matter more than the survival ones. A plant can be perfectly alive at 28 °C and still give you nothing.
How cold is too cold for arugula? Check your temperaturesEnter your night low and day high — see if it survives, and if it will cropTimeline
Arugula growing stages, day by day
Click any stage to see what's happening. Durations shift with temperature — a warm season runs roughly a quarter faster than a cool one.
Feeding
Fertiliser schedule for arugula
Feed on the interval below, changing what you give as the plant shifts from making leaves to making fruit.
| Stage | What to use | Per 10 L | Every |
|---|
How to prepare each feed
Common mistakes
Why arugula fails, and how to avoid it
- A container that is too small
Below 5 litres the root run is too shallow. The plant grows, flowers late, and drops whatever it sets because it cannot support the crop.
- Watering too lightly
A daily splash wets the top few centimetres and nothing else. Arugula wants about 500 ml per 10 litres of soil — one deep soak beats three shallow ones.
- Ignoring the flower-drop threshold
Above 25 °C flowers fall before setting. The plant can look perfectly healthy and still give you nothing — shade it through the hottest hours.
- Harvesting too late
Left too long the colour changes, seeds harden and the flavour sharpens. Pick on the signs listed below, not on the calendar.
- Planting it beside Cabbage
As a fellow brassica, cabbage (and other brassicas like broccoli, kale) competes for similar nutrients and attracts the same pests (e.g., cabbage worms, flea beetles), increasing pest pressure on arugula.
Companions
What to plant with arugula
Good neighbours
Fix nitrogen in the soil, which benefits arugula's leafy growth. They also don't compete for light or space.
Their deep roots help loosen and aerate the soil, improving drainage and making it easier for arugula roots to grow.
Act as a trap crop for aphids, drawing them away from arugula. Their flowers and leaves are also edible.
Repel nematodes and other harmful soil pests, contributing to a healthier root environment for arugula.
Keep apart from
As a fellow brassica, cabbage (and other brassicas like broccoli, kale) competes for similar nutrients and attracts the same pests (e.g., cabbage worms, flea beetles), increasing pest pressure on arugula.
Can inhibit the growth of arugula due to allelopathic effects or competition for nutrients.
Grapes can release compounds that are detrimental to the growth of many annual vegetables, including arugula.
Problems
Arugula pests and diseases
Each lists the weather that brings it on, so you know when to start checking rather than reacting once it's established.
Flea Beetles humidity any · temp >18
Small, shiny, jumping beetles that chew tiny, round holes in arugula leaves, giving them a 'shot-hole' appearance. Can severely damage young plants.
Aphids humidity any · temp 15-25
Small, soft-bodied insects that cluster on the undersides of leaves and new growth, sucking sap and causing leaves to curl, yellow, and become distorted. May leave sticky honeydew.
Downy Mildew humidity >80% · temp 10-20
Causes yellow or pale green spots on the upper surface of leaves, with fuzzy gray or purplish growth on the undersides. Favors cool, moist conditions.
White Rust humidity >90% · temp 10-25
Appears as white, blister-like pustules, primarily on the undersides of leaves, which can eventually rupture and release powdery spores. Can cause leaf distortion.
Bolting humidity any · temp >25
Premature flowering and seed stalk development, often triggered by high temperatures, long daylight hours, or water stress. Causes leaves to become bitter and tough.
Slugs And Snails humidity >70% · temp 10-20
Chew irregular holes in leaves, especially on young plants. Look for slime trails as evidence of their presence, particularly in damp conditions.
Harvest
When to harvest arugula
First picking falls between day 20 and day 40, and the plant then keeps producing for about 30 days. Pick often — what you leave on the plant signals it to stop making more.
How to tell it's ready
- Leaves 2-6 inches long
- Before bolting (flowering)
How much to expect
Storing it: Refrigerate in an airtight container or plastic bag for up to 1 week. Wash just before use.
Questions
Arugula: common questions
How long does arugula take to grow?
About 30 days from sowing to the first harvest, with picking usually starting between day 20 and day 40. It then keeps producing for roughly 30 more days. Warm weather pulls that forward; cool weather pushes it back.
What size pot does arugula need?
At least 5 litres and 15 cm deep for one plant. A raised bed wants 10 litres of soil and 20 cm of depth.
How often should I water arugula?
About 500 ml per 10 litres of soil, every 2 days in normal weather — daily when it is hot and every 3 days when cool. Water in the early morning.
What temperature does arugula need?
It does best between 10 °C and 20 °C and survives from -5 °C to 28 °C. Seed needs soil above 5 °C to germinate, ideally around 15 °C.
Can I grow arugula in winter?
It tolerates cold better than most, down to about -5 °C, so a sheltered spot or a cold frame will often carry it through.
How do I know when arugula is ready to harvest?
Leaves 2-6 inches long; Before bolting (flowering). Once picked: refrigerate in an airtight container or plastic bag for up to 1 week. wash just before use.
How much does one arugula plant produce?
Roughly 0.4 kg from a 20 litre container, or about 1 kg in open ground. Larger containers give proportionally more, up to a point.