Scarlet Globe

Radish

25d to harvest

Crisp as a fresh snowfall, Scarlet Globe radish forms a perfectly round, glossy scarlet globe with a clean, bright bite and a pleasantly mild heat. The flesh stays tender and juicy, with a fine, satiny texture that holds its snap in salads and quick garnishes. Grow Scarlet Globe for a fast, satisfying harvest—about 25 days from sowing—when you want color, crunch, and dependable uniformity in every sowing.

Crop Dates

Growing note: In frost-free Zone 13b, grow this cool-season crop during the cooler dry season (October–February).

Milestone	Date
Start Indoors	—
Climate	Frost-Free Climate
Transplant / Sow Outdoors	Oct 1st
Harvest Begins	Oct 26th
Harvest Ends	Feb 28th

Crop Details

Trait	Value
Days to Maturity	25
Sun Requirements	Full Sun
Growth Habit	Taproot
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	50
Min Soil Temp (°F)	45
Min Night Temp (°F)	28
Harden Off (days)	Not Required

Frequently Asked Questions

How do I manage powdery mildew or downy mildew on Raphanus sativus (scarlet globe radish)?

Watch for pale, dusty patches (powdery mildew) or grayish/fuzzy growth with leaf yellowing (downy mildew), especially in humid, crowded beds. Improve airflow by thinning to about 1–2 in (2.5–5 cm) between plants and water at the soil line so leaves stay dry; remove heavily affected leaves. If conditions stay wet, use a labeled fungicide suitable for edible brassicas and follow the label interval before harvesting.

How often should I water scarlet globe radish during active root growth to avoid splitting or woody roots?

Keep the top 1–2 in (2.5–5 cm) of soil consistently moist but not soggy from when seeds germinate until harvest. In most home gardens, that typically means light watering 1–2 times per week, with more frequent small waterings during hot or windy weather; aim for steady moisture to prevent cracking. If you notice radishes getting tough or bitter, increase the regularity of watering rather than soaking once.

When are scarlet globe radishes (Raphanus sativus) ready to harvest?

Harvest in about 25 days when the roots are fully rounded and reach roughly 1–1.5 in (2.5–4 cm) across and feel firm. Don’t leave them in the ground after they size up—overgrown radishes of this type get pithy and sharper in flavor. Check a couple plants early, then harvest the rest promptly at the same root size.