When to Plant Potatoes in Lawrence, KS
Published: April 24, 2026
Potato Planting Dates for Lawrence, KS
| Start seeds indoors | Year-round |
| Last frost (average) | March 22 |
| Direct sow outdoors | March 1–11 |
| Minimum soil temperature | 45°F |
| Expect first harvest | May 10 – June 29 |
| First fall frost (average) | November 10 |
⚠ Plant seed potatoes 2–4 weeks before last frost when soil is workable and above 45°F. Hill soil up around stems as plants grow. Needs well-drained, loose soil.
Best Potato Varieties for Lawrence, KS
Consult a Lawrence-area nursery or your state extension office for potato varieties proven in Zone 6b.
Growing Potatoes in Lawrence
Lawrence sits in Zone 6b, with an average last frost of March 22 and first fall frost around November 10 — giving a 233-day frost-free growing season. Cool-season crops like potato benefit from Lawrence's cooler spring and fall windows, when temperatures stay in the 55–75°F sweet spot that produces the best flavor and least bolting.
Lawrence's moderate climate supports potato on the standard transplant calendar with minimal special accommodation. Succession planting — sowing fresh seeds or setting new transplants every 2–3 weeks through spring — stretches the harvest window and gives you a backup crop if pests hit the first planting.
Lawrence's heavy clay soil benefits from raised beds or deep organic matter amendment before planting potato. Clay retains moisture well but compacts easily — add 3 to 4 inches of compost and work it in to 12 inches before planting. Consistent watering (1.5 inches per week) is especially important in clay soil, which can crack and pull away from roots during dry spells; mulch around plants to stabilize moisture.
Potato Calendar for Lawrence
| Month | Task |
|---|---|
| Year | Start seeds indoors under grow lights |
| March | Direct sow seeds into warm soil |
| May | Expect first harvest window to open |
| November | First fall frost — harvest remaining, end of outdoor season |
Potato Tips for Lawrence Gardeners
- •Cut seed potatoes into 2-inch chunks with at least two eyes each, then let cut surfaces heal for 24–48 hours before planting.
- •Plant 4 inches deep and 12 inches apart in loose, well-drained soil; add compost but avoid fresh manure.
- •Succession plant potato in Lawrence every 2–3 weeks through spring to extend the harvest window into summer.
Common Potato Pests in Lawrence
- •Colorado Potato Beetle — peaks July in Zone 6b (active May–September); monitor closely during peak season and treat early.
- •Wireworm — peaks July in Zone 6b (active May–September); orange-brown beetle larvae in soil; trap with cut potato pieces buried in soil.
- •Potato Scab — peaks July in Zone 6b (active May–September); monitor closely during peak season and treat early.
Check plants every 2–3 days during peak season — early intervention prevents most infestations from becoming serious.
What to Plant with Potatoes in Lawrence
In Lawrence's moderate climate, Bean and Corn are the most beneficial plants to grow alongside potato. Bean improves nearby plant health and pest resistance. Keep potato away from Tomato — it competes for nutrients or shares pest pressure.
Frequently Asked Questions
When should I plant potato in Lawrence, KS?
In Lawrence (Zone 6b), direct sow potato around March 1–11. Soil must be at 45°F or warmer at 2-inch depth before sowing — cold soil rots the seeds.
What zone is Lawrence, KS for potato growing?
Lawrence is USDA Zone 6b. For potato, this means a frost-free growing season of roughly 33 weeks running from March 22 to November 10. Cool-season crops like potato thrive in this zone with both spring and fall planting windows available.
When is potato harvest season in Lawrence?
Expect the first potato harvest in Lawrence around May 10, with harvest continuing through June 29. This is based on 70–120 days from transplant or direct sow.
How long does it take to grow potato in Lawrence, KS?
From transplant or direct sow to first harvest, potato takes 70–120 days in Lawrence's climate. Based on a typical planting date of March 1–11, expect your first harvest around May 10. Lawrence's Zone 6b transition-zone climate produces maturity times right in the middle of the stated range.
What soil does potato need in Lawrence?
Lawrence's heavy clay soil compacts easily and drains slowly — problematic for potato which needs oxygenated roots. Build a raised bed or amend deeply with 3–4 inches of compost worked into the top 12 inches. Add gypsum if the soil is severely compacted. Consistent watering matters especially in clay because the soil can crack and pull away from roots during dry spells.