How close can radishes be planted?

Space 1 inch apart in rows just 6 inches apart — radishes are one of the most compact garden crops.

How fast do radishes grow?

Spring radishes mature in about 30 days from sowing — the fastest root crop in the garden.

How much does one radish weigh?

A single standard radish yields about 0.05 lb (roughly 0.8 oz); grow many for meaningful volume.

Radish: Spacing, Yield & Planting Dates

Plant count & yield calculator

Pre-filled for this crop — adjust bed size or pick a different vegetable.

Bed length

Bed width

Crop

Enter bed size to count plants.

Seed starting dates

Pre-filled last frost — change the date to rebuild the full crop schedule. For Radish with this frost date , direct sow ~Mar 18 .

Pick a last frost date for the schedule.

About radish

Radishes are the gateway crop for impatient gardeners, delivering crisp, peppery roots in as little as 30 days and marking slow-germinating rows in between.

Spacing & yield

Radish wants 1×6 inches and about 0.05 lb per plant at ~30 days to maturity.

Growing tips

Sow every week for non-stop spring radishes until temperatures exceed 80 F.
Thin promptly to 1 inch apart — crowded radishes will not bulb.
Harvest the moment shoulders push above the soil line; even one extra week causes pithiness.
Use as row markers between carrots or parsnips to track seeded rows.

Common mistakes

Growing in summer heat, which makes radishes hot, hollow, and bolt quickly.
Leaving radishes in the ground too long past maturity, turning them woody.

Harvest & storage

Pull roots at 1 inch diameter when tops are 4-6 inches tall, just 30 days from sowing.

Twist off greens immediately; roots keep 1-2 weeks refrigerated in a damp towel.

Companion planting

Good neighbors for radish: carrots, peas, lettuce, cucumbers, spinach. Avoid planting beside: hyssop.

Planting calendar

Direct sow about 4 weeks before your last spring frost. Use the seed-starting calculator above with your real county frost date — the April 15 default is only a worked example (zone 6 style).

Estimates only — consult your local extension office for advice specific to your land and animals.

Frequently asked questions

How close can radishes be planted?: Space 1 inch apart in rows just 6 inches apart — radishes are one of the most compact garden crops.
How fast do radishes grow?: Spring radishes mature in about 30 days from sowing — the fastest root crop in the garden.
How much does one radish weigh?: A single standard radish yields about 0.05 lb (roughly 0.8 oz); grow many for meaningful volume.