Blue Potato

Family: Solanaceae Root Vegetable

Planting Schedule

Provide your location or planting zone to unlock dates and add Blue Potato to a garden.

Velvety, slate-blue skin gives way to a vivid, electric-blue interior that’s as striking as it is satisfying—an eye-catching harvest that turns every basket into a keepsake.

Blue Potato forms sturdy, medium-to-large tubers with a smooth, well-set shape and a firm, creamy bite when cooked, making it ideal for roasting, mashing, and strikingly colorful sides and spreads. Grow it for the drama: deep color, dependable performance, and a distinctive look that elevates any table.

Light: Full SunMaturity: 90 DaysHabit: Clumping

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

Crop Details

Trait	Value
Days to Maturity	90
Sun Requirements	Full Sun
Growth Habit	Clumping
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

Culinary Notes

Chef's Note

This blue-fleshed potato cooks up with a satisfying creamy bite and a color that doesn’t just disappear—it lingers in the mash and roast interior. Use it where you want texture contrast (crisp edges, creamy core) and where the blue interior can steal the plate.

Best Uses

roasting to get crisp edges while keeping a creamy center
mashing or whipping for a vivid blue mash that stays smooth
pan-frying into brown, crunchy-skirted slices
baking and splitting for showy toppings (butter, sour cream, herbs)

Flavor Profile

earthy, potato-starchy sweetness firm-creamy interior that holds its shape when cooked low-to-mid water, with a plush mashability

Kitchen Pairings

butter sour cream garlic black pepper rosemary lemon zest

Frequently Asked Questions

What should I do if my blue potato plants get late blight or leaf spot?

Late blight often starts as irregular, water-soaked spots with a grayish growth on leaf undersides, spreading fast in cool, wet weather. Remove and discard infected leaves (don’t compost), improve airflow by spacing plants well, and if the problem is active apply a labeled potato fungicide early and repeat according to the label—especially after rainy periods. Leaf spot is usually more localized; prune off affected foliage and avoid wetting leaves when watering.

How often should I water blue potatoes during the main growing phase?

During tuber set and bulking (about weeks 4–10 after planting), keep soil evenly moist but not waterlogged—aim for watering whenever the top 1–2 inches feel dry. A typical home schedule is every 3–5 days depending on heat and rainfall, giving enough water to wet the root zone (about 6–8 inches deep). Stop heavy watering about 10–14 days before harvest so skins set and tubers store better.

How can I tell when blue potatoes are ready to harvest?

Harvest “new” potatoes at about 60 days, but for full maturity wait around 90 days when plants start yellowing and dying back. Gently dig one hill first—ready potatoes have skins that won’t rub off easily and tubers feel firm and well-sized for the variety. Harvest on a dry day, cure them (keep in a cool, dark place) for about 7–10 days before storage.