Long Black Spanish

Radish

Zone 5a Save Garden

Botanical illustration of Long Black Spanish

🌱 60d to harvest Taproot

Sink your senses into Long Black Spanish’s velvety, inky skin—an elegant black radish with a long, tapered silhouette and a crisp…

Crop Dates

Milestone	Date
Start Indoors	Direct Sow
Last Frost	May 8th
Transplant / Sow Outdoors	May 8th
Harvest Begins	Jul 7th
Harvest Ends	Sep 30th

Crop Details

Trait	Value
Days to Maturity	60
Sun Requirements	Full Sun
Growth Habit	Taproot
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	55
Min Soil Temp (°F)	45
Min Night Temp (°F)	28
Harden Off (days)	Not Required

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Frequently Asked Questions

What pest or disease issue commonly affects Raphanus sativus (long black radish), and how do I control it?

Black radish (Raphanus sativus) in the Brassicaceae family is prone to clubroot, which causes swollen, distorted roots and stunted growth. To control it, avoid planting in the same bed for 4–6 years, keep soil evenly moist but not waterlogged, and if you’ve had clubroot before, incorporate lime to raise soil pH toward ~7.2 before sowing. Watch for leaf-feeding flea beetles early and use floating row cover until plants are established to reduce damage.

How often should I water long black Spanish radish during the main growing phase to get a long, solid root?

During active root bulking (roughly weeks 3–8), keep the soil consistently evenly moist—about 1 inch (2.5 cm) of water per week total, adjusted for rain and heat. Let the top 1 inch of soil dry slightly between waterings, but don’t allow extended drying because that can cause woody roots or cracking. Water deeply so moisture reaches the developing root, not just the surface.

How can I tell when Raphanus sativus (long black Spanish radish) is ready to harvest?

Harvest around 60 days after sowing when the roots have filled out and the shoulders are clearly visible above the soil surface. The outside should feel firm and heavy for its size, and the skin should be fully dark black. If you wait too long, the roots can become tougher—so pull a test root a week before maturity and harvest the rest when it matches the desired firmness.

Sink your senses into Long Black Spanish’s velvety, inky skin—an elegant black radish with a long, tapered silhouette and a crisp, bright interior that feels cool and snappy at first bite. Expect a pleasantly pungent, peppery bite that mellows beautifully when allowed to develop fully, with a clean, juicy texture that holds its character from garden to table. Ideal for fresh slicing, bold pickling, and roasting, Long Black Spanish brings a dramatic, gourmet presence to any radish assortment.

Sowing Tips

Transplant Conditions

Wait until soil reaches 45°F and nights stay above 28°F before moving outdoors.

Expert Note

Direct sow in cool weather and keep soil consistently moist so the long roots form straight and don’t get pithy.