When to Plant Beans in Lawrence, KS
Published: April 24, 2026
Bean Planting Dates for Lawrence, KS
| Start seeds indoors | Year-round |
| Last frost (average) | March 22 |
| Direct sow outdoors | March 29–April 8 |
| Minimum soil temperature | 60°F |
| Expect first harvest | May 18 – June 2 |
| Fall crop planting | September 1–11 |
| Fall crop harvest | October 21 |
| First fall frost (average) | November 10 |
⚠ Direct sow beans after last frost when soil reaches 60°F. Never start indoors — beans resent transplanting. Succession plant every 2–3 weeks for continuous harvest.
Best Bean Varieties for Lawrence, KS
Consult a Lawrence-area nursery or your state extension office for bean varieties proven in Zone 6b.
Growing Beans 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. Warm-season crops like bean need soil at 60°F or above before transplanting; Lawrence's frost calendar puts that window clearly in the late-spring to early-fall range.
Lawrence's moderate climate supports bean 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 bean. 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 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.
Bean 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 |
| September | Start fall crop — transplants or direct sow |
| November | First fall frost — harvest remaining, end of outdoor season |
Bean Tips for Lawrence Gardeners
- •Inoculate bean seeds with rhizobium bacteria before planting in new garden soil — boosts nitrogen fixation and yields.
- •Plant bush beans every 2–3 weeks through midsummer for a continuous harvest from July to first frost.
- •Succession plant bean in Lawrence every 2–3 weeks through spring to extend the harvest window into summer.
Common Bean Pests in Lawrence
- •Mexican Bean Beetle — peaks July in Zone 6b (active May–September); yellow beetles that skeletonize leaves; handpick eggs on leaf undersides.
- •Aphid — peaks July in Zone 6b (active May–September); monitor closely during peak season and treat early.
- •Bean Rust — 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 Beans in Lawrence
In Lawrence's moderate climate, Corn and Cucumber are the most beneficial plants to grow alongside bean. Corn provides vertical support for climbing companions in the Three Sisters planting. Keep bean away from Onion — it inhibits bean and pea growth through sulfur-compound allelopathy.
Frequently Asked Questions
When should I plant bean in Lawrence, KS?
In Lawrence (Zone 6b), direct sow bean around March 29–April 8. Soil must be at 60°F or warmer at 2-inch depth before sowing — cold soil rots the seeds.
What zone is Lawrence, KS for bean growing?
Lawrence is USDA Zone 6b. For bean, this means a frost-free growing season of roughly 33 weeks running from March 22 to November 10. This is a comfortable window for warm-season crops like bean — standard varieties work well.
When is bean harvest season in Lawrence?
Expect the first bean harvest in Lawrence around May 18, with harvest continuing through June 2. This is based on 50–65 days from transplant or direct sow. A fall crop planted September 1–11 adds a second harvest around October 21.
How long does it take to grow bean in Lawrence, KS?
From transplant or direct sow to first harvest, bean takes 50–65 days in Lawrence's climate. Based on a typical planting date of March 29–April 8, expect your first harvest around May 18. Lawrence's Zone 6b transition-zone climate produces maturity times right in the middle of the stated range.
What soil does bean need in Lawrence?
Lawrence's heavy clay soil compacts easily and drains slowly — problematic for bean 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.