All Blue

Family: Solanaceae Root Vegetable

All Blue delivers an eye-catching, velvety-deep blue tuber with a creamy, richly colored interior that stays vivid after cooking.

Expect a smooth, medium-firm texture and a pleasantly earthy, nutty flavor that shines in roasted wedges, pan-fried slices, and hearty mashes—plus it’s a standout for color-forward soups and gratins. With about 95 days to maturity, this blue potato is a rewarding garden crop that turns harvest into a true visual delight.

Light: Full SunMaturity: 95 DaysHabit: Upright

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

Milestone	Date
Start Indoors	Direct Sow
Last Frost	Apr 25th
Transplant / Sow Outdoors	Apr 25th
Harvest Begins	Jul 29th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	95
Sun Requirements	Full Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	50
Min Soil Temp (°F)	45
Min Night Temp (°F)	35
Harden Off (days)	Not Required

Culinary Notes

Chef's Note

All Blue’s creamy, medium-firm tuber gives you that classic potato satisfaction—crisp outside, yielding inside—while keeping its blue tone vivid instead of turning muddy. It’s especially worth using when you want the color to be part of the dish, like in gratins or thick soups where the starch has time to thicken.

Best Uses

hot, crisp roasted wedges that stay structured inside
pan-fried slices for a golden crust and creamy center
hearty mash where the color stays blue-purple on the plate
color-forward soups and gratins where it won’t dull

Flavor Profile

earthy, nutty potato flavor smooth, medium-firm bite creamy interior that holds vivid color when cooked slight sweetness on the finish

Kitchen Pairings

garlic black pepper butter gruyère fresh thyme smoked paprika

Frequently Asked Questions

How do I manage powdery mildew on All Blue (about 95 days) when it shows up on my foliage?

Look for white, powdery patches on leaves and stems, usually starting midseason on plants grown in dense growth. Remove the worst affected leaves, improve airflow by spacing and pruning nonessential foliage, and water at the soil line so leaves stay dry. If it keeps spreading, spray a labeled potassium bicarbonate or sulfur product and repeat as directed, especially after humid stretches.

How often should I water All Blue during its main growing phase to keep tubers developing well?

During the main growth period (roughly after plants are established and until near maturity), keep soil evenly moist but not soggy—about 1 inch of water per week, split into 2–3 waterings during hot weather. Check by digging 2–3 inches down: if it feels dry at that depth, water; if it’s muddy, hold off and let it dry slightly to avoid rotting.

When are All Blue tubers ready to harvest, and what signs should I look for?

Harvest at about 95 days from planting when the plants begin to yellow and most foliage has died back, and the tuber skins feel firm and not rub off easily. For a final check, gently dig one plant to confirm tuber size and skin set. Avoid harvesting right after heavy rain—aim for dry conditions so skins cure better and storage lasts longer.