Radish — Package of Practices
The fastest vegetable on the farm — sow into loose soil, keep it moving with water, and pull it young before it turns pithy.
Overview
Radish is a quick-growing root crop; tropical (Asian) types can be ready in a few weeks. It is direct-sown and thrives in loose soil with steady moisture.
Its golden rule is timing: pull the roots young and tender, because left a few days too long they turn pithy and hot. Fresh manure and stones cause forking.
Climate & season
Radish grows best in cool to mild weather (about 15–25 °C); tropical types tolerate more warmth. Heat makes roots pungent and pithy and triggers bolting.
- Cool to mild weather gives crisp, mild roots.
- Heat makes roots hot, pithy and prone to bolting.
- Tropical types suit warmer plains; temperate types need cool weather.
Soil & land preparation
A loose, well-drained loam suits radish, at a pH of 6–7. Stones and fresh manure cause forked roots.
- Work the soil to a fine, loose tilth and remove stones.
- Incorporate 20–25 t/ha of well-rotted manure — never fresh.
- Form beds for drainage and easy pulling.
- Rotate away from other cole crops to limit club root and white rust.
Choosing a type & seed
Choose by root shape, length and colour (white, red, pink), and pungency, and match tropical or temperate types to your season. No specific cultivar is named here.
Seed rate
- About 8–12 kg/ha.
- Sow in rows directly; radish is always direct-sown.
Seed treatment
- Use fresh seed for quick, even germination.
- Treat with Trichoderma against seedling rots if needed.
Sowing & spacing
- Direct-sow 1–2 cm deep in rows on a loose, fine bed.
- Spacing: rows about 30 cm apart; thin to 8–10 cm within the row.
- Keep the bed moist for fast, even emergence.
- Sow small batches every couple of weeks for a steady supply.
Nutrient management
Radish is a quick crop that needs ready nutrients in loose soil and only well-rotted manure (fresh manure forks the roots). A common dose is around N–P–K 50 : 50 : 50 kg/ha (some recommendations give more phosphorus). Fine-tune to your soil test.
Apply as basal
- 20–25 t/ha of well-rotted farmyard manure (never fresh).
- Full phosphorus and potassium and half the nitrogen as the basal dose.
Top-dress nitrogen
- Remaining nitrogen at the first hoeing — the crop is short, so feed it early.
Irrigation
- Give a light irrigation right after sowing, then keep the soil evenly moist.
- Irrigate about every 6–7 days depending on weather.
- Even moisture keeps roots crisp and prevents cracking.
- Avoid waterlogging, which rots the roots.
Weeds & special care
- Keep the crop weed-free early; the slow seedlings compete poorly.
- Thin the seedlings to the right spacing for well-formed roots.
- Hoe shallowly and a pre-emergence herbicide is an option — follow the label.
- Keep the bed loose and open so roots swell freely.
Plant protection
Work the IPM way — clean fields, scouting and need-based sprays. The crop is short, so problems must be caught fast.
Major pests
| Pest | Damage | Manage with |
|---|---|---|
| Flea beetle | Tiny shot-holes in the leaves of young plants | Neem, row covers on seedlings, need-based control |
| Aphids | Suck sap; sticky, curled leaves | Yellow sticky traps, neem, conserve predators |
| Mustard sawfly | Larvae skeletonise the leaves | Hand-pick, neem |
Major diseases
| Disease | Signs | Manage with |
|---|---|---|
| White rust | White, blister-like pustules on the leaf underside | Rotation, airflow, recommended fungicide |
| Alternaria leaf spot | Dark target-ring spots on leaves | Rotation, remove debris, recommended fungicide |
| Downy mildew | Pale patches with downy growth in cool, damp weather | Good drainage and airflow |
| Pithiness (disorder) | Spongy, hollow roots from late harvest or heat | Pull young and tender; avoid heat stress |
Use chemicals safely
The products above are examples, not a prescription. Doses, approved crops and pre-harvest intervals differ by country and change over time. Always read the label, wear protective gear, use the correct dose, observe the waiting period before harvest, protect bees, and confirm with your local agriculture officer.
Harvest & yield
- Pull roots young and tender — tropical types in about 25–45 days, temperate types in 50–60.
- Don't delay: roots quickly turn pithy, hot and unmarketable.
- Water lightly before pulling to ease lifting.
- Typical yield: 20–30 t/ha.
Post-harvest handling
- Trim tops, wash and grade; radish has a short shelf life.
- Keep cool and humid; it wilts and softens fast.
- Remove forked, split or pithy roots.
- Bunch or bag for quick market.
Field tips that pay off
- Pull young — the most common mistake is harvesting late.
- Loose soil, no fresh manure for straight, smooth roots.
- Feed early — the crop is too short to wait.
- Succession-sow small batches for a steady supply.
Related crops
Radish — Package of Practices
The fastest vegetable on the farm — sow into loose soil, keep it moving with water, and pull it young before it turns pithy.
Overview
Radish is a quick-growing root crop; tropical (Asian) types can be ready in a few weeks. It is direct-sown and thrives in loose soil with steady moisture.
Its golden rule is timing: pull the roots young and tender, because left a few days too long they turn pithy and hot. Fresh manure and stones cause forking.
Climate & season
Radish grows best in cool to mild weather (about 15–25 °C); tropical types tolerate more warmth. Heat makes roots pungent and pithy and triggers bolting.
- Cool to mild weather gives crisp, mild roots.
- Heat makes roots hot, pithy and prone to bolting.
- Tropical types suit warmer plains; temperate types need cool weather.
Soil & land preparation
A loose, well-drained loam suits radish, at a pH of 6–7. Stones and fresh manure cause forked roots.
- Work the soil to a fine, loose tilth and remove stones.
- Incorporate 20–25 t/ha of well-rotted manure — never fresh.
- Form beds for drainage and easy pulling.
- Rotate away from other cole crops to limit club root and white rust.
Choosing a type & seed
Choose by root shape, length and colour (white, red, pink), and pungency, and match tropical or temperate types to your season. No specific cultivar is named here.
Seed rate
- About 8–12 kg/ha.
- Sow in rows directly; radish is always direct-sown.
Seed treatment
- Use fresh seed for quick, even germination.
- Treat with Trichoderma against seedling rots if needed.
Sowing & spacing
- Direct-sow 1–2 cm deep in rows on a loose, fine bed.
- Spacing: rows about 30 cm apart; thin to 8–10 cm within the row.
- Keep the bed moist for fast, even emergence.
- Sow small batches every couple of weeks for a steady supply.
Nutrient management
Radish is a quick crop that needs ready nutrients in loose soil and only well-rotted manure (fresh manure forks the roots). A common dose is around N–P–K 50 : 50 : 50 kg/ha (some recommendations give more phosphorus). Fine-tune to your soil test.
Apply as basal
- 20–25 t/ha of well-rotted farmyard manure (never fresh).
- Full phosphorus and potassium and half the nitrogen as the basal dose.
Top-dress nitrogen
- Remaining nitrogen at the first hoeing — the crop is short, so feed it early.
Irrigation
- Give a light irrigation right after sowing, then keep the soil evenly moist.
- Irrigate about every 6–7 days depending on weather.
- Even moisture keeps roots crisp and prevents cracking.
- Avoid waterlogging, which rots the roots.
Weeds & special care
- Keep the crop weed-free early; the slow seedlings compete poorly.
- Thin the seedlings to the right spacing for well-formed roots.
- Hoe shallowly and a pre-emergence herbicide is an option — follow the label.
- Keep the bed loose and open so roots swell freely.
Plant protection
Work the IPM way — clean fields, scouting and need-based sprays. The crop is short, so problems must be caught fast.
Major pests
| Pest | Damage | Manage with |
|---|---|---|
| Flea beetle | Tiny shot-holes in the leaves of young plants | Neem, row covers on seedlings, need-based control |
| Aphids | Suck sap; sticky, curled leaves | Yellow sticky traps, neem, conserve predators |
| Mustard sawfly | Larvae skeletonise the leaves | Hand-pick, neem |
Major diseases
| Disease | Signs | Manage with |
|---|---|---|
| White rust | White, blister-like pustules on the leaf underside | Rotation, airflow, recommended fungicide |
| Alternaria leaf spot | Dark target-ring spots on leaves | Rotation, remove debris, recommended fungicide |
| Downy mildew | Pale patches with downy growth in cool, damp weather | Good drainage and airflow |
| Pithiness (disorder) | Spongy, hollow roots from late harvest or heat | Pull young and tender; avoid heat stress |
Use chemicals safely
The products above are examples, not a prescription. Doses, approved crops and pre-harvest intervals differ by country and change over time. Always read the label, wear protective gear, use the correct dose, observe the waiting period before harvest, protect bees, and confirm with your local agriculture officer.
Harvest & yield
- Pull roots young and tender — tropical types in about 25–45 days, temperate types in 50–60.
- Don't delay: roots quickly turn pithy, hot and unmarketable.
- Water lightly before pulling to ease lifting.
- Typical yield: 20–30 t/ha.
Post-harvest handling
- Trim tops, wash and grade; radish has a short shelf life.
- Keep cool and humid; it wilts and softens fast.
- Remove forked, split or pithy roots.
- Bunch or bag for quick market.
Field tips that pay off
- Pull young — the most common mistake is harvesting late.
- Loose soil, no fresh manure for straight, smooth roots.
- Feed early — the crop is too short to wait.
- Succession-sow small batches for a steady supply.