French Breakfast radish

Sun

Full sun; light afternoon shade can help in warm weather.

Water

Keep the root zone evenly moist but not waterlogged; dry spells followed by heavy watering encourage splitting.

Soil

Loose, well-drained soil with modest fertility, ideally pH 6.0-7.0. Remove stones and break up compacted soil before sowing.

Height

0.5-1 ft (0.15-0.3 m) in leaf; taller if allowed to flower

Spread

0.25-0.5 ft (0.08-0.15 m)

Flowers

White to pale pink, often with purple veins, on tall stems if plants are left to bolt in late spring or summer.

Foliage

Green, rough-haired leaves with irregularly lobed edges, forming a loose rosette.

Growth

Fast; usually ready to harvest in 3-5 weeks, longer in cold weather.

Care needed

Low

• Low allergen
• Edible

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Easy

Toughness

Fairly tough

Pick your zone, country, light and whether you have pets.

1. Planting day

   0.5 ft (0.15 m)

2. After 1 year

   0.7 ft (0.22 m)

   full size

Full size in one season.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Safe

Growth rate

Fast

• Sow directly about 0.5 in (1 cm) deep; avoid transplanting, which can disturb root development.
• Thin seedlings to 2-3 in (5-8 cm) apart soon after emergence.
• Water before the soil dries out, especially while roots are swelling.
• Use modest amounts of mature compost; avoid fresh manure and high-nitrogen feeds.
• Sow small batches every 1-2 weeks during cool weather rather than one large crop.

Pruning. No pruning is needed. Harvest before flower stems develop; remove bolting plants unless you want flowers or seed.

Pull roots when they are about 2-3 in (5-8 cm) long, usually 3-5 weeks after sowing; uncover a shoulder or pull a sample to check size. Harvest promptly while roots are firm and crisp, as older roots become pithy and hotter. Young, healthy leaves are also edible, raw or cooked.

Late winter

In mild climates, prepare a sunny bed and begin sowing once soil is workable; use protection if conditions remain cold.

Spring

Direct-sow small batches every 1-2 weeks and thin seedlings promptly.

Late spring

Check root size frequently and harvest before plants become woody or bolt.

Summer

Pause sowing during hot weather; in cool districts, continue with reliable moisture and some afternoon shade.

Late summer

Resume sowing as temperatures fall, allowing several weeks of growing weather before persistent frost.

Autumn

Harvest remaining roots and remove crop debris; in frost-free districts, continue sowing through the cooler season.

• Plant short rows along vegetable-bed edges for an easily reached crop.
• Use repeated rows in a potager for orderly patches of fresh green foliage.
• Grow in troughs or containers near the kitchen for frequent small harvests.
• Sow between slower-growing vegetables, harvesting before their leaves close over the space.

Garden styles it suits: Potager (kitchen garden), Edible landscape, Homestead, Cottage garden, Small-space and Family-friendly.

Plant it with: Lettuce, Spinach, Carrots, Spring onions, Peas and Chervil.

Wildlife: Plants left to flower provide pollen and nectar for bees and other insects, but flowering reduces root quality. Seedlings may be eaten by slugs and snails.

• Flea beetles pepper leaves with small holes: cover seedlings with fine insect mesh immediately after sowing and secure the edges.
• Cabbage root fly maggots tunnel into roots: use insect mesh over a clean bed and rotate away from previous brassica crops.
• Bolting, hot flavour or pithy roots: grow in cool weather, maintain moisture and harvest promptly.
• Leafy tops with little root development: thin crowded seedlings, provide adequate sun and avoid excess nitrogen.

Not known to be toxic to people, cats, dogs or horses. Roots and leaves are edible, although large amounts may cause digestive upset, and the peppery flavour can irritate sensitive mouths.

• Cherry Belle radish (Raphanus sativus 'Cherry Belle')

  Produces round, red roots rather than elongated red roots with distinct white tips.

• Turnip (Brassica rapa subsp. rapa)

  Usually forms broader, rounder roots and takes longer to mature; leaves alone can be difficult to distinguish when young.

Raphanus comes from the Greek name for radish, while sativus means cultivated.

Propagation. Grow from seed sown directly where plants will mature. Seed saved from flowering plants may cross with other radishes nearby and may not produce roots true to French Breakfast.

Accepted botanical name

Raphanus sativus

In the US and Canada

Introduced in Alaska, Canada, Greenland, Hawaii, the lower 48 states, Pacific Basin and Puerto Rico.

Sources: GBIF (CC BY 4.0) and USDA PLANTS. The care and design notes are LandscapeGPT's own.