Rattail Radish

Radish

45d to harvest

Fragrant, peppery pods unfurl on Rattail Radish, turning the garden into a living bouquet of crisp green and soft lavender blooms. At maturity, the slender, dangling seed pods hold a tender snap and a bright, radish-sharp flavor that’s especially prized for quick pickling and lively fresh use. Grow it for its distinctive rat-tail silhouette—an edible spectacle that keeps producing as long as you harvest the pods young.

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	Nov 15th
Harvest Ends	Feb 28th

Crop Details

Trait	Value
Days to Maturity	45
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

Frequently Asked Questions

What pest or disease is most likely on Raphanus sativus (rattail radish), and how can I prevent it?

Rattail radish is especially prone to flea beetle feeding (small holes in leaves), which can stunt young plants quickly. Protect seedlings with row cover until plants are established, and dust with or spray with an approved insecticidal soap if you see active beetles. To reduce disease risk, avoid overhead watering and keep plants spaced for airflow so leaves dry fast after rain or irrigation.

How often should I water rattail radish during its main growing phase?

During the main growth (from sprouting through bulbing/pod development), keep soil consistently evenly moist—about 1 inch of water per week, adjusted for your weather. Water deeply when the top 1 inch of soil dries, because fluctuating moisture can lead to tough, poor-quality roots/pods. In full sun, check more frequently and use a light mulch to prevent the surface from drying out between waterings.

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

Harvest around 45 days from sowing when the radish roots are visibly enlarged and reach their typical rattail size, and pods (if you’re growing for the seed pods) are well formed and elongated. Check a sample by gently pulling one plant: roots should feel firm, not hollow or overly fibrous. Harvest promptly once they’re ready because extended time in warm conditions can make roots tougher and reduce tenderness.