Purple Majesty

Family: Solanaceae Root Vegetable

Planting Schedule

Provide your location or planting zone to unlock dates and add Purple Majesty to a garden.

Velvety skins in Purple Majesty arrive at maturity in a rich, inky blue-purple that feels almost satin under the fingers, with a strikingly colored interior that turns deep violet when cooked.

The flesh is satisfyingly firm yet tender, holding its shape beautifully for roasting and pan-frying, while its vivid color makes show-stopping mash and creamy soups. Grow Purple Majesty for a dramatic harvest you’ll want to serve often—its color is the star, from first harvest to the last spoonful.

Light: Full SunMaturity: 90 DaysHabit: Upright

Botanical illustration of Purple Majesty

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Purple Majesty 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	Upright
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	55
Min Soil Temp (°F)	45
Min Night Temp (°F)	35
Harden Off (days)	Not Required

Culinary Notes

Chef's Note

Purple Majesty keeps a firm, roast-ready structure while cooking, so the outside goes crisp and the interior stays creamy rather than collapsing. Its violet hue is most striking when you use hot, dry heat or emulsify gently—lightly mash with butter, or let it tint a creamy soup instead of overboiling.

Best Uses

hot-oven roasting with crisp edges—color stays bold
pan-frying into golden, crackly rounds for contrast
showy purple mash (warm with butter and salt, minimal aggression)
creamy soups where the color can bleed into the broth for drama

Flavor Profile

earthy, nutty potato starchiness slightly sweet, violet-tinted aftertaste when cooked firm-tender bite that holds shape creamy interior that purées smoothly

Kitchen Pairings

unsalted butter garlic sour cream lemon fresh thyme black pepper

Frequently Asked Questions

What pest or disease commonly affects Solanum tuberosum (Purple Majesty) and what should I do?

Late blight (often appearing as dark, water-soaked leaf spots that spread quickly) is a major risk for potatoes, especially in humid weather. Start by removing infected leaves or plants immediately, then spray with a labeled fungicide that contains chlorothalonil or mancozeb early in the outbreak window and repeat as directed on the label. Also improve airflow by avoiding crowding and watering the soil (not the foliage) to slow disease spread.

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

During active tuber bulking (roughly from when plants are flowering until about 3–4 weeks before harvest), keep soil evenly moist but not waterlogged. Water deeply about 1–2 times per week depending on weather, aiming for about 1 inch (2–3 cm) of water total weekly; sandy soils may need more frequent watering while heavy soils need less. If the top few inches dry out completely, bump the watering, but avoid standing water to prevent tuber rots.

How can I tell when Purple Majesty (Solanum tuberosum) is ready to harvest?

Harvest when plants naturally begin to yellow and die back, typically around 90 days from planting for Purple Majesty. You can check by gently digging alongside the row—tubers should be well-formed and the skins should hold firm when rubbed (they shouldn’t peel easily). For best storage quality, wait about 10–14 days after the tops fully die back before lifting.