Purple Plum Radish stacked on slices of radishes on a white background.
Close-up view of Purple Plum Radishes with slices and a purple handled knife on a white background.
A bundle of Purple Plum Radishes on a light countertop.
Five Purple Plum Radishes arranged on blue hand-crafted ceramic dish on pale pink background.
A single Purple Plum Radish against a pale pink background.
Purple Plum Radish stacked on slices of radishes on a white background.
Close-up view of Purple Plum Radishes with slices and a purple handled knife on a white background.
A bundle of Purple Plum Radishes on a light countertop.
Five Purple Plum Radishes arranged on blue hand-crafted ceramic dish on pale pink background.
A single Purple Plum Radish against a pale pink background.

Radish Seeds,
Purple Plum

4.324 ReviewsSKU: #RD122Min. seed count: 200
Price
Regular price $3.00
Regular price $0.00 Sale price $3.00
Save $-3
/
Shipping calculated at checkout.
Description

(Raphanus sativus). Here is one lovely radish, with its bright purple skin that makes this one of the most colorful varieties for marketing. 1½" globes have sweet, crisp, white flesh that does not get pithy.

Growing Tips: Purple Plum radishes thrive in full sun, requiring at least 6 hours of direct sunlight daily. The radish prefers well-draining, slightly acidic to neutral soil (pH 5.8-6.8). Before planting, it's a good idea to loosen the soil to improve aeration and root expansion. Consistent moisture is key, as dry soil can cause the radishes to become tough or woody, while overly wet conditions can lead to splitting.

Plant Details

Botanical Name
Raphanus sativus
Life Cycle
Annual
Sun Requirement
Full sun
Days to Germinate
3–6
Days to Maturity
28
Planting Depth
¼ in.
Plant Spacing
2 in.
Ideal Temperature
50–75°F
Frost Hardy
Yes

When to Grow

Purple Plum radishes are cool-season crops that perform best when grown in early spring. They can be sown 4 weeks before the last expected spring frost. Ideal growing temperatures are between 50-75 F, with temperatures in the low 60s being optimal. Higher temperatures can cause radishes to bolt, reducing the quality of the roots​. If you’re not sure how to find your first and last frost dates, consult our blog post 'Our Experts Answer Questions, Share Resources.'

How to Sow and Plant

Plant the seeds directly in the garden about 1/4 inch deep and 1 inch apart in rows spaced 3 inches apart. Once seedlings emerge, thin them to 2 inches apart to prevent overcrowding, which can hinder root development. You can also sow spring radishes in several small successions for a continuous harvest.

How to Grow

Water the radishes consistently, aiming for about 1 inch of water per week to maintain soil moisture and promote bulb development. Using mulch around the plants can help retain moisture and reduce weed growth, creating a more stable environment for the radishes to grow. Fertilization isn't generally required if the soil is already fertile, but a balanced, low-nitrogen fertilizer can be used sparingly to support growth​.

How to Save Seeds

  • Radishes are insect-pollinated, so you'll need to isolate varieties by up to 1⁄2 mile or stagger plantings to avoid flowering at the same time.
  • Staggering can be easy because of the radish's quick maturity.
  • Allow flower stalks to shoot up and seed pods to dry on the plant before picking pods and opening by hand to remove the seeds.
  • Seeds will remain viable for up to 5 years when stored in an airtight container.

FAQ

Can Purple Plum radishes be grown in containers?

Yes, they can, as long as the containers are at least 6 inches deep, have adequate drainage, and are placed in a location that receives full sunlight.

How do I know when my Purple Plum radishes are ready to harvest?

Radishes are typically ready to harvest when the roots are about 1 inch in diameter. You can gently pull one out to check its size. This variety should mature in about 28 days.

Can I eat Purple Plum radish greens?

Yes, radish greens are edible and can be used in salads, stir-fries, or as a garnish. They offer a slightly peppery taste similar to the radish root itself.

Browse our full range of radish seeds.
FREE SHIPPING IN THE U.S.A.
Alternate domestic shipping options available at checkout.
You may also like