Blue Belle

Family: Solanaceae Root Vegetable

Planting Schedule

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

Silky-skinned Blue Belle potatoes reveal a cool, slate-blue interior that’s as alluring as it is delicious—creamy and richly flavored with a gentle, nutty depth.

Expect a firm, smooth texture that holds its shape beautifully, making these blue potatoes a standout for roasting and pan-frying, while their striking color also shines in mashes, soups, and vibrant salads. A true showpiece from the garden to the plate, Blue Belle brings rare color and dependable harvests to home growers.

Light: Full SunMaturity: 90 DaysHabit: Spreading

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Blue Belle 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	Spreading
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	50
Min Soil Temp (°F)	45
Min Night Temp (°F)	28
Harden Off (days)	Not Required

Culinary Notes

Chef's Note

Blue Belle’s firm, smooth starch profile makes it behave beautifully under high heat—crisping at the edges without collapsing into mash-town. The nutty, lightly earthy flavor plays best with butter, smoke, and sharp partners that cut through the creaminess.

Best Uses

roasting until edges go crisp while centers stay creamy
pan-frying or skillet potatoes where cubes keep their shape
mashing for a silkier, scoopable texture and color pop
soups and chowders where they thicken without turning grainy

Flavor Profile

creamy, starchy interior with a gentle nutty tone firm, smooth bite that holds its shape cool, earthy flavor character that stays sweet rather than grassy

Kitchen Pairings

smoked bacon garlic rosemary butter sour cream black pepper

Frequently Asked Questions

How do I prevent and treat gray mold (Botrytis) on Blue Belle (90-day) plants?

Gray mold shows up as fuzzy gray growth on leaves, flowers, or berries—usually when plants stay wet and airflow is poor. Remove and discard affected parts immediately, then thin foliage so clusters aren’t touching and water at the soil line (not over the plants). If it keeps recurring, spray a registered fungicide labeled for your berry/crop (follow label intervals), and stop using overhead watering until dry weather returns.

How often should I water Blue Belle during the main growing season to keep berries sweet and avoid disease?

During the main growing phase (roughly the mid-season after plants are established), water deeply about 1–2 times per week, aiming for evenly moist soil 6–8 inches down. Check before watering: if the top 1 inch of soil is dry, soak until it drains, but don’t leave the bed soggy or water daily. During hot spells, you may need more frequent deep soakings to prevent wilting and poor berry fill—always prioritize soil moisture over a fixed schedule.

How can I tell when Blue Belle is ready to harvest?

Harvest when berries turn fully blue and have a waxy “bloom” and firm, springy flesh—no red or pink remaining at the blossom end. Taste-test a few: Blue Belle is ready when berries are sweet with balanced acidity (often 90 days from planting, depending on start date and transplant timing). Pick in cool hours and handle gently; berries will release easily when ripe.