GrowSabzHow to grow radish in pots
Also called mooli, fajl, radis · Raphanus sativus
مولی
- ☀️ Sunlight
- 6–8hours daily
- 💧 Water
- 0.4 Levery 2 days, 5 L pot
- 🌡️ Ideal temp
- 10–18°C
- 🪴 Min pot
- 5 L15 cm deep
- 🧺 Harvest
- 21–30days from sowing
- ⚖️ Yield
- 1 kgper 20 L pot
Radish is one of the fastest things you can grow — roughly 25 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 radish in a 5 litre container at least 15 cm deep, watering about 600 ml per 10 litres of soil every 2 days, and keep temperatures between 10 and 18 °C. First harvest comes 21–30 days after sowing.
Where to plant it
What size pot does radish 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 | Shallow but wide pots are best |
| Grow bag | 5 L | 15 cm | Good for drainage and aeration |
| Open ground | — | 15 cm | Ensure loose, well-draining soil |
| Raised bed | 10 L | 20 cm | Excellent for controlling soil conditions |
Watering
How often should you water radish?
Every 2 days through the growing season, at about 600 ml per 10 litres of soil — daily in hot weather, every 3 days when it turns cool. Water in the early morning. Consistent, gentle watering works best.
Too little water
- woody roots
- hot taste
- cracked roots
- bolting
Too much water
- split roots
- root rot
- yellowing leaves
Avoid: inconsistent watering; letting soil dry out completely; waterlogging.
Climate
Can you grow radish where you live?
No hardiness zone needed — compare your actual temperatures against the plant's own limits.
| Ideal range | 10 – 18 °C |
|---|---|
| Survives | -5 – 25 °C |
| Germinates above | 4 °C — best at 20 °C, about 5 days |
| Flowers drop | above 25 °C, or below -5 °C |
| Sunlight | 6–10 hrs/day, best 8 |
| Frost | Low sensitivity |
The flower-drop thresholds matter more than the survival ones. A plant can be perfectly alive at 25 °C and still give you nothing.
How cold is too cold for radish? Check your temperaturesEnter your night low and day high — see if it survives, and if it will cropTimeline
Radish 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 radish
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 radish 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. Radish wants about 600 ml per 10 litres of soil — one deep soak beats three shallow ones.
- Ignoring the flower-drop threshold
Above 25 °C, or below -5 °C, flowers fall before setting. The plant can look perfectly healthy and still give you nothing — shade it through the hottest hours.
- Planting it beside Hyssop
Known to inhibit the growth of radishes and other brassicas.
Companions
What to plant with radish
Good neighbours
Provides shade to the soil, keeping it cool and moist, which helps prevent radishes from bolting prematurely.
Acts as a trap crop for aphids, drawing them away from radishes, and can deter other pests like flea beetles.
Its strong scent helps deter flea beetles and other common radish pests.
Both are root vegetables with similar soil requirements, and carrots can help loosen the soil for easier radish growth.
Believed to improve the flavor and growth of radishes.
Keep apart from
Known to inhibit the growth of radishes and other brassicas.
Can stunt the growth of radishes if planted too close.
Competes for nutrients and can attract similar pests, though less critical than for other crops.
Problems
Radish 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
Tiny, jumping beetles that chew small, round holes in radish leaves, especially on young seedlings. Can stunt growth.
Aphids humidity any · temp 15-25
Small, soft-bodied insects that cluster on the undersides of leaves and new growth, sucking sap and weakening the plant.
Root Maggots humidity any · temp 10-20
Larvae of the cabbage root fly tunnel into radish roots, creating unsightly channels and making them inedible. Often leads to wilting.
Downy Mildew humidity >80% · temp 10-20
Causes yellow spots on the upper surface of leaves and fuzzy, grayish-purple growth on the undersides. Can lead to defoliation.
Clubroot humidity any · temp 18-25
A soil-borne disease causing swollen, distorted, club-like roots. Infected plants are stunted and wilt easily. Affects all brassicas.
Bolting humidity any · temp >25
Premature flowering and seed stalk formation, often triggered by hot weather, inconsistent watering, or overcrowding. Makes roots woody and spicy.
Harvest
When to harvest radish
First picking falls between day 21 and day 30, and the plant then keeps producing for about 10 days. Pick often — what you leave on the plant signals it to stop making more.
How to tell it's ready
- Root diameter 1-2 inches
- Firm to the touch
How much to expect
Storing it: Refrigerate with tops removed
Questions
Radish: common questions
How long does radish take to grow?
About 25 days from sowing to the first harvest, with picking usually starting between day 21 and day 30. It then keeps producing for roughly 10 more days. Warm weather pulls that forward; cool weather pushes it back.
What size pot does radish 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 radish?
About 600 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 radish need?
It does best between 10 °C and 18 °C and survives from -5 °C to 25 °C. Seed needs soil above 4 °C to germinate, ideally around 20 °C.
Can I grow radish 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 radish is ready to harvest?
Root diameter 1-2 inches; Firm to the touch. Once picked: refrigerate with tops removed
How much does one radish plant produce?
Roughly 1 kg from a 20 litre container, or about 2 kg in open ground. Larger containers give proportionally more, up to a point.