Small round red radishes growing at the soil surface beneath green leaves.
Photo: Rasbak · CC BY-SA 3.0. Source caption: “Whole plant”. Cropped for display. Re-encoded as WebP. Image adaptation available under CC BY-SA 3.0. Pictured: round red salad radishes; the source does not name their cultivar. Choose a labeled small round type such as Cherry Belle for this recipe.
Plant Care Steps · Growing guideplantcaresteps.com/plants/radish/

Vegetables · A sunny patio during a cool spell

Let’s grow
radish.

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Raphanus sativus

This plan is for Small round salad radish; not long-rooted daikon

Light: Give this small root crop good light, not a dim indoor corner.

Planting steps ↓

YOUR SIMPLE GROWING PLAN

One pot. Here’s the plan.

Before you start Sow the final pot directly during cool weather. This 8-inch-deep container is for small round roots; check the packet rather than using this plan for daikon.

What you need · pot, mix & supplies
  • One 12-inch square planter, at least 8 inches deep
  • 18 small round radish seeds, such as Cherry Belle
  • Fresh potting mix and a gentle watering can

The soil

Miracle-Gro Organic Potting Mix (US, with starter nutrients; check your bag for additional-feeding directions)

A sunny patio during a cool spell. Start with seeds.

THE POT12 × 12 × 8 in.

One draining square planter; this plan uses small round radishes.

HOW MANY18 seeds → 9 plants

Two seeds at each of 9 spots, 3 inches apart.

See the planting illustration
Illustrated starting setup: 12 × 12 × 8 in.; 18 seeds → 9 plants.
12 × 12 × 8 in. · 18 seeds → 9 plants One draining square planter; this plan uses small round radishes. Two seeds at each of 9 spots, 3 inches apart. Original illustration; not to scale.
  1. 01

    Make a small grid

    Fill and dampen the mix. Mark 3 rows of 3 spots, each 3 inches apart, centered in the planter.

  2. 02

    Sow two at each spot

    Cover each pair with ½ inch of mix. Water gently so seeds stay in place.

  3. 03

    Keep just nine

    When the seedlings have true leaves, snip extras at soil level. Leave one strong plant at each spot.

  4. 04

    Check the roots on time

    Near the packet’s harvest date, gently uncover a root shoulder and pull one to check. Harvest at the listed size; leaving them longer does not guarantee a better radish.

Other ways to start
Start directly from seed+

For this root crop, direct sowing in the final pot is the straightforward option. This guide does not offer a stem-cutting or root-piece recipe; buy a labeled packet and avoid moving seedlings between pots.

YOUR EVERYDAY ROUTINE

Water & fertilizer at a glance.

Water when
Keep the seeded layer lightly moist. Once rooted, water when the surface starts drying; wet the deeper mix and let excess drain. Empty the saucer or outer pot after draining.
Fertilizer
Miracle-Gro Water Soluble All Purpose Plant Food (US 24-8-16)
Amount
1 tablespoon in 1 US gallon of water
What that amount covers
Mix into water. Apply only enough solution to wet this pot and drain; the mixing batch is not the amount to pour on.
How often to feed
Only when additional feeding is due: every 14 days during active growth. Stop at harvest or when growth finishes.
When to start or pause
Check your potting-mix bag before adding food. Fresh enriched mix may cover a short crop; do not stack full-rate feeds.
Product directions ↗

Use level measures and the exact US formula shown. If your label differs, follow it; do not transfer this dose to another formula or combine feeding programs.

See the watering & feeding illustrations
A soil check followed by slow root watering and free drainage.
Check before watering. Keep the seeded layer lightly moist. Once rooted, water when the surface starts drying; wet the deeper mix and let excess drain. Original illustration; not to scale.
Fertilizer measure for Radish: 1 tablespoon in 1 US gallon of water. Mix into water. Apply only enough solution to wet this pot and drain; the mixing batch is not the amount to pour on.
1 tablespoon in 1 US gallon of water Mix into water. Apply only enough solution to wet this pot and drain; the mixing batch is not the amount to pour on. Only when additional feeding is due: every 14 days during active growth. Stop at harvest or when growth finishes. Check your potting-mix bag before adding food. Fresh enriched mix may cover a short crop; do not stack full-rate feeds. Original illustration; not to scale.
Illustrated reference for Miracle-Gro Water Soluble All Purpose, US 24-8-16; not actual packaging.

US PRODUCT REFERENCE

Miracle-Gro

Water Soluble All Purpose

24-8-16

Soluble: mix into water

Check the official US product ↗

Illustrated reference; check the manufacturer’s current packaging and US label.

Sprouting and checking harvest time
03 / WHAT HAPPENS NEXT

Utah State gives about 5–10 days for emergence at 55–75°F. The packet’s harvest estimate is a check-in date: inspect a root shoulder and pull a test root at the listed size. Temperature, variety and growing conditions affect the pace. Do not apply a fast salad-radish harvest date to a long winter radish.

Choose a cool growing window

Choose cool spring or fall conditions. Hot weather can make roots harsher and encourage flowering. This is not a summer heat-tolerant or winter daikon recipe.

For regional planting windows, find your local Cooperative Extension office ↗.

Something looking off?

Why are there leaves but barely any radish?+

First check crowding and light, and whether the crop is growing in hot weather. Keep one plant per spot; do not add fertilizer automatically.

Why have the roots split?+

A dry spell followed by heavy watering can contribute to cracking, and roots left past their best harvest stage can also split. Keep moisture steadier and check a test root at the packet’s suggested size. A cracked root will not close again; inspect the remaining crop promptly.

Can I use this pot for daikon?+

This plan is for short, round salad radishes. Long-rooted daikon needs a different depth and harvest plan.

Thinning and harvesting roots
Thin seedlings at each planting spot

Nine positions at 3-inch spacing leave room around the roots. Two seeds per position allow for a missed sprout; thinning is part of the recipe, not an optional extra.

Pull one root, then sow again

Pull the whole plant when the root is ready. For another crop, sow new seeds; keep the variety label with the planter so the intended root size is easy to check.

Help with your next step.

Sources, dates & detailed PDF

Editorial plans, not results from a Plant Care Steps growing trial. Compiled with AI assistance; they have not yet had an independent horticultural review. Editorial approach.

Something needs updating? Suggest a correction

Published · Updated

By jennyzhuang

Sources checked View sources ↗

Detailed PDF ↓

Full reference edition with expanded explanations and illustrations. Its publication dates appear in the file.

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Soil: Miracle-Gro Organic Potting Mix (US, with starter nutrients; check your bag for additional-feeding directions)

By jennyzhuang

Sources checked View sources ↗

Published · Updated

Read the online Sources section for linked references and the full reference PDF.

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Plant Care Steps · Care card

Radish

Raphanus sativus

Water
Keep the seeded layer lightly moist. Once rooted, water when the surface starts drying; wet the deeper mix and let excess drain.
Light
A sunny spot. Give this small root crop good light, not a dim indoor corner.
Temperature
Cool weather. A sunny patio during a cool spell
Common problems
Why are there leaves but barely any radish. First check crowding and light, and whether the crop is growing in hot weather. Keep one plant per spot; do not add fertilizer automatically.