Rudolf

Radish

Zone 3a Save Garden

🌱 25d to harvest Taproot

Crisp as fresh-cut glass, Rudolf radishes arrive in just 25 days with a clean, bright bite and a delicately sweet finish. Their s…

Crop Dates

Milestone	Date
Start Indoors	Direct Sow
Last Frost	May 15th
Transplant / Sow Outdoors	May 15th
Harvest Begins	Jun 9th
Harvest Ends	Sep 1st

Crop Details

Trait	Value
Days to Maturity	25
Sun Requirements	Full Sun
Growth Habit	Taproot
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	55
Min Soil Temp (°F)	40
Min Night Temp (°F)	28
Harden Off (days)	Not Required

Recommended Companions

Forellenschluss Lettuce

Flashy Butter Gem Lettuce

Frequently Asked Questions

What pest or disease commonly affects radish (Raphanus sativus), and how can I stop it?

Watch for flea beetles, which chew small holes in radish leaves and can stunt fast-growing seedlings. Cover newly sown beds with a lightweight row cover until plants are established, and keep the soil consistently slightly moist (drought makes plants harder to recover). If you see powdery mildew-like spotting, remove heavily affected leaves promptly and avoid wetting foliage—radishes are quick, so improving airflow and hygiene helps before harvest.

How often should I water radish (Raphanus sativus) during the main growing phase?

Water to keep the top 1–2 inches of soil evenly moist from sowing through bulbing, usually about 1 inch per week total in warm weather, split into 2–3 waterings. If the soil dries then suddenly gets wet, radishes are more likely to turn woody or split—aim for steady moisture. Check by feel: the soil should crumble slightly, not stay soggy.

How do I tell when radish (Raphanus sativus) is ready to harvest?

Start checking at about 20–25 days after sowing, because radishes become pithy if left too long. Harvest when the roots are fully sized and feel firm when gently pulled or pressed near the soil line, with the tops still green and healthy. If the roots look elongated or the bulbs are hard to develop, pull promptly and harvest a little earlier next time for a better texture.

Crisp as fresh-cut glass, Rudolf radishes arrive in just 25 days with a clean, bright bite and a delicately sweet finish. Their smooth, satiny skins glow in a vivid scarlet-red over a slender white tip, while the flesh stays tender-crunchy—ideal for quick, vibrant salads and garnish-worthy platters. Grow Rudolf for a fast, eye-catching harvest that turns every bowl into a rosy, refreshing moment.

Sowing Tips

Transplant Conditions

Wait until soil reaches 40°F and nights stay above 28°F before moving outdoors.

Expert Note

For crisp, mild radishes, sow shallowly and keep soil evenly moist; harvest as soon as roots fill out to avoid pithiness.