Spanish Black

Family: Brassicaceae Root Vegetable

Planting Schedule

Provide your location or planting zone to unlock dates and add Spanish Black to a garden.

Sink your senses into Spanish Black’s velvety, ink-dark roots—deep as polished slate—set beneath a crown of crisp green leaves.

The flesh is clean and bright, with a refreshing bite that turns mellow and sweet when roasted, and stays lively for fresh slicing. Grow Spanish Black for bold flavor in root-forward dishes, for roasting trays, and for striking pickles that showcase its dramatic color from garden to jar.

Light: Full SunMaturity: 70 DaysHabit: Rosette

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Spanish Black Planting Dates by USDA Zone

Estimated US hardiness-zone windows for sow, transplant, and harvest. Enter a US ZIP above for exact local dates, or open a zone below.

Zone	Start Indoors	Sow / Transplant	Harvest
Zone 1a	Protected Environment Only
Zone 1b	Protected Environment Only
Zone 2a	Direct Sow	May 25th	Aug 3rd – Aug 29th
Zone 2b	Direct Sow	May 15th	Jul 24th – Aug 25th
Zone 3a	Direct Sow	May 15th	Jul 24th – Sep 1st
Zone 3b	Direct Sow	May 19th	Jul 28th – Sep 21st
Zone 4a	Direct Sow	May 15th	Jul 24th – Sep 24th
Zone 4b	Direct Sow	May 13th	Jul 22nd – Sep 27th
Zone 5a	Direct Sow	May 8th	Jul 17th – Sep 30th
Zone 5b	Direct Sow	May 4th	Jul 13th – Oct 5th
Zone 6a	Direct Sow	May 1st	Jul 10th – Oct 10th
Zone 6b	Direct Sow	Apr 25th	Jul 4th – Oct 16th
Zone 7a	Direct Sow	Apr 20th	Jun 29th – Oct 20th
Zone 7b	Direct Sow	Apr 10th	Jun 19th – Oct 28th
Zone 8a	Direct Sow	Apr 1st	Jun 10th – Nov 5th
Zone 8b	Direct Sow	Mar 23rd	Jun 1st – Nov 12th
Zone 9a	Direct Sow	Mar 6th	May 15th – Nov 26th
Zone 9b	Direct Sow	Feb 9th	Apr 20th – Dec 9th
Zone 10a	—	Oct 1st	Dec 10th – Feb 28th
Zone 10b	—	Oct 1st	Dec 10th – Feb 28th
Zone 11a	—	Oct 1st	Dec 10th – Feb 28th
Zone 11b	—	Oct 1st	Dec 10th – Feb 28th
Zone 12a	—	Oct 1st	Dec 10th – Feb 28th
Zone 12b	—	Oct 1st	Dec 10th – Feb 28th
Zone 13a	—	Oct 1st	Dec 10th – Feb 28th
Zone 13b	—	Oct 1st	Dec 10th – Feb 28th

Crop Details

Trait	Value
Days to Maturity	70
Sun Requirements	Full Sun
Growth Habit	Rosette
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	45
Min Soil Temp (°F)	40
Min Night Temp (°F)	28
Harden Off (days)	Not Required

Culinary Notes

Chef's Note

Spanish Black reads as peppery and crisp raw, then softens into sweet, toasted earth when you roast it—so it lives comfortably on both ends of the temperature dial. Choose it when you want a radish that holds crunch for slicing or turns plush at the edges without collapsing.

Best Uses

fresh slicing with salt and a slick of olive oil—keep it snappy, not wilted
roasting whole or in thick chunks until the surface browns and the interior turns buttery
quick-pickles or refrigerator pickles to lock in that ink-dark drama and tang
grating into creamy sauces (yogurt/sour cream) to make a sharp, cooling condiment

Flavor Profile

peppery, crisp bite with a clean radish snap earthy, slate-like character and a bright, slightly sweet finish becomes mellow and syrupy at the edges when roasted high-contrast crunch in fresh slices

Kitchen Pairings

butter extra-virgin olive oil lemon yogurt or sour cream sea salt fresh dill

Frequently Asked Questions

Why are my Raphanus sativus (Spanish Black radish) leaves getting pale, mottled, and distorted, and what can I do?

This pattern is often caused by aphids or flea beetles spreading stress damage, and it can quickly worsen in warm spells. Check the undersides of leaves twice a week and knock aphids off with a strong water spray, then cover seedlings with an insect net or row cover to block further feeding. If damage is severe, remove heavily infested plants promptly to reduce spread and restart under cover for the next sowing.

How often should I water Spanish Black radish during active root growth to prevent cracking or pithiness?

During the main growth period (roughly weeks 3–8), keep soil consistently evenly moist, about 1 inch (2.5 cm) of water per week depending on rainfall and heat. Water deeply after the top 1 inch (2.5 cm) dries, rather than frequent light sprinkling, to encourage steady root thickening. Uneven watering—especially swings from dry to wet—commonly leads to splitting or hollow/pithy roots.

When is Spanish Black radish (Raphanus sativus) ready to harvest, and how can I confirm it?

Harvest at about 70 days from sowing (often a bit earlier if roots size up sooner), when the roots are firm and reach the typical mature size for your seed packet. Lift one plant to check: the skin should be fully colored (black outside) with a crisp, firm interior when you cut it. If roots are left too long, they can become woody or develop a stronger bite.