King Edward
90d to harvest
Silky-skinned and richly flavored, King Edward potatoes bring a luminous, creamy-white tuber with a fine, even texture that feels almost velvety in the hand. Expect a dependable, all-season harvest in about 90 days, with tubers that roast to a golden crust and turn tender and fluffy for mashing, as well as beautifully suited to hearty stews and gratins. A classic white potato for gardeners who want dependable performance and a refined, comforting bite.
Crop Dates
Growing note: Zone 1b has only 61 frost-free days — shorter than this crop's 90-day maturity. Outdoor planting is not viable; use protected cultivation.
| Milestone | Date |
|---|---|
| Last Frost | Jun 1st |
| Growing Approach | Protected Environment Only |
Crop Details
| Trait | Value |
|---|---|
| Days to Maturity | 90 |
| 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) | 28 |
| Harden Off (days) | Not Required |
Frequently Asked Questions
What’s the most common disease to watch for on Solanum tuberosum (potatoes) and how do I manage it?
Watch for late blight (often starts as dark, greasy-looking leaf spots that spread quickly in cool, humid weather). Remove and bag infected foliage immediately, avoid overhead watering, and water at the soil line; if it’s spreading, use a labeled late-blight fungicide early and repeat as directed. Also plant in well-drained soil and don’t work the plants when leaves are wet to reduce spread.
How often should I water King Edward potatoes during their main growth?
During active foliage growth, keep the soil evenly moist but not waterlogged—about 1 inch (2.5 cm) per week total, adjusted for rainfall and your soil’s drainage. Water deeply after checking the row: the top 2–3 inches should feel slightly dry before the next watering, but the ridge should still hold moisture. Once tubers begin swelling, irregular dry spells followed by heavy watering can lead to misshapen tubers, so aim for steady moisture.