Black Spanish

Family: Brassicaceae Root Vegetable

Planting Schedule

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Sink your senses into Black Spanish’s velvety, inky skin and crisp, ivory interior—an earthy, peppery bite that feels both bold and clean.

At maturity it forms a smooth, globe-to-oval root with a firm, juicy crunch, ideal for slicing fresh and for roasting until tender and mellow. Grow this 55-day black radish for a dramatic garden harvest and a striking flavor that shines in salads, relishes, and quick pickles.

Light: Full SunMaturity: 55 DaysHabit: Taproot

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Black Spanish 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	Direct Sow	Jun 1st	Jul 26th – Aug 1st
Zone 2a	Direct Sow	May 25th	Jul 19th – Aug 29th
Zone 2b	Direct Sow	May 15th	Jul 9th – Aug 25th
Zone 3a	Direct Sow	May 15th	Jul 9th – Sep 1st
Zone 3b	Direct Sow	May 19th	Jul 13th – Sep 21st
Zone 4a	Direct Sow	May 15th	Jul 9th – Sep 24th
Zone 4b	Direct Sow	May 13th	Jul 7th – Sep 27th
Zone 5a	Direct Sow	May 8th	Jul 2nd – Sep 30th
Zone 5b	Direct Sow	May 4th	Jun 28th – Oct 5th
Zone 6a	Direct Sow	May 1st	Jun 25th – Oct 10th
Zone 6b	Direct Sow	Apr 25th	Jun 19th – Oct 16th
Zone 7a	Direct Sow	Apr 20th	Jun 14th – Oct 20th
Zone 7b	Direct Sow	Apr 10th	Jun 4th – Oct 28th
Zone 8a	Direct Sow	Apr 1st	May 26th – Nov 5th
Zone 8b	Direct Sow	Mar 23rd	May 17th – Nov 12th
Zone 9a	Direct Sow	Mar 6th	Apr 30th – Nov 26th
Zone 9b	Direct Sow	Feb 9th	Apr 5th – Dec 9th
Zone 10a	—	Oct 1st	Nov 25th – Feb 28th
Zone 10b	—	Oct 1st	Nov 25th – Feb 28th
Zone 11a	—	Oct 1st	Nov 25th – Feb 28th
Zone 11b	—	Oct 1st	Nov 25th – Feb 28th
Zone 12a	—	Oct 1st	Nov 25th – Feb 28th
Zone 12b	—	Oct 1st	Nov 25th – Feb 28th
Zone 13a	—	Oct 1st	Nov 25th – Feb 28th
Zone 13b	—	Oct 1st	Nov 25th – Feb 28th

Crop Details

Trait	Value
Days to Maturity	55
Sun Requirements	Full Sun
Growth Habit	Taproot
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

Black Spanish delivers a clean, peppery sting wrapped in a firm, watery crunch—great for slicing so it doesn’t go limp under dressing. Roast it until tender and it turns from aggressive to mellow, making it a knockout for butter, honey-vinegar, or mustard-forward pairings.

Best Uses

paper-thin slicing for salads where it stays snappy
quick pickling for a sharp, clean tang
roasting until the interior turns tender for a mellow, almost turnip-like bite
grating into relishes to perfume heavier meats

Flavor Profile

earthy peppery bite juicy, crisp crunch mellows to tender sweetness with heat

Kitchen Pairings

butter honey apple cider vinegar chives mustard lamb

Frequently Asked Questions

How do I stop black Spanish (eggplant) from getting spider mites or leaf stippling?

In warm, dry weather, check the undersides of leaves for tiny moving specks and fine stippling. Spray the undersides with insecticidal soap in the evening and repeat every 5–7 days for at least 3 rounds, since mites quickly rebound from eggs. Keep foliage evenly hydrated by avoiding drought stress, and remove heavily infested leaves to slow spread.

How often should I water black Spanish (eggplant) during the main growing phase?

From when plants start flowering through harvest, water deeply to keep the root zone evenly moist—about 1 inch per week total, adjusted for heat and container size. Aim for watering 1–2 times per week with thorough soaking, then let the top 1 inch of soil dry slightly before the next watering to prevent fruiting issues from soggy roots. Mulch helps maintain consistent moisture, which reduces blossom drop and stress.

What are the signs black Spanish (eggplant) is ready to harvest?

Harvest when fruits are glossy dark purple/black, firm, and about 6–8 inches long for typical Black Spanish size. Check at least 55 days from transplanting (often sooner on strong plants): if the skin looks dull or the fruit feels soft/spongy, it’s overmature and may taste bitter. Use scissors or a sharp knife and cut the fruit with a short stem to avoid damaging nearby flowers.