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When to plant Hostas in Haskell County, KS

Plant Hostas in Haskell County during the brief April 25–May 9 window. With 183 frost-free days, fall plantings can't mature before October 18.

When to Plant Hostas in Haskell County, KS

Haskell County, Kansas Zone 6b August

This month in Haskell County, Kansas

Your garden in Haskell County, Kansas is working on a schedule, even when you're not. Here's where you should be this August.

Avg. last frost April 18
Avg. first frost October 18
Soil temp (4") 82°F
Watering High
Pest pressure High
Daylight 13.4 hrs
  1. Pick hostas

    This is the payoff month. Bring a basket, bring a friend, and get into the beds.

Coming up in September — start thinking about
  • First harvests: hostas

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Hostas (Hosta spp.) are the undisputed kings of the shade garden, grown primarily for their spectacular mounded foliage in shades of deep green, blue-green, gold, and variegated combinations. Originating in East Asia (Japan, China, Korea), hostas form dense, long-lived clumps that reliably return year after year with minimal care. In summer, tall scapes of lavender or white tubular flowers rise above the foliage — some cultivars (notably H. plantaginea hybrids) are notably fragrant. Extremely adaptable in moist, well-drained soil with consistent shade to part shade.

Haskell County, Kansas is in USDA Zone 6b. The average last spring frost is April 18 and the first fall frost is October 18, giving you a growing season of approximately 183 days.

At an elevation of 824 feet, Haskell County receives approximately 24.4 inches of rainfall annually with predominantly loam soil. Summer highs average 85°F, providing good warmth for Hostas during the growing season.

Perennial Blooms in Summer Pollinator-friendly
Haskell County, KS (Zone 6b) Moderate season
183 days
Last Spring Frost April 18
183 growing days
First Fall Frost October 18

Haskell County Soil Profile

Soil Type

Loam

Soil pH

6.4-7.4

Drainage

Well Drained

Hostas Planting Risk Windows

Early Start (70% safe) ✗ May not fit
Start indoors: Feb 3 Transplant: Apr 21 🌸 Bloom: Jul 7 – Oct 27
Recommended (50%) ✗ May not fit
Start indoors: Feb 7 Transplant: Apr 25 🌸 Bloom: Jul 11 – Oct 31
Safe Start (90%) ✗ May not fit
Start indoors: Feb 22 Transplant: May 10 🌸 Bloom: Jul 26 – Nov 15

Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.

Soil Compatibility in Haskell County

How your county's soil matches Hostas's growing requirements.

Soil pH

Your soil pH (6.4–7.4) is within Hostas's preferred range (6.0–7.5).

Soil Texture

The loam soil in Haskell County is excellent for Hostas — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is excellent (4.3%) — Hostas will thrive.

How to Plant Hostas

1"
Planting Depth
24"
Between Plants
30"
Between Rows

Succession Planting Hostas

3
successive plantings in your 183-day season

Sow every 6.9 weeks. Last sowing by Jul 20 to harvest before frost.

Hostas Water Budget

Plant needs
1.0″/week
Rainfall provides
0.6″/week
You supply
0.5″/week
Watering frequency 1-2 times/week
Season total 860 gal / 100 sq ft
Drought risk

Water stress score is 8/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Hostas

Hostas needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.

Month Hostas Needs Rainfall You Supplement Action
Jan 1.6" 0" ❄️ Dormant
Feb 1.6" 0" ❄️ Dormant
Mar 2.4" 0" ❄️ Dormant
Apr 4.3" 2.5" 1.8" 💧 Light watering
May 4.3" 2.8" 1.5" 💧 Light watering
Jun 4.3" 1.6" 2.7" 🚿 Regular watering
Jul 4.3" 2.2" 2.1" 💧 Light watering
Aug 4.3" 2.3" 2" 💧 Light watering
Sep 4.3" 2.2" 2.1" 💧 Light watering
Oct 4.3" 2.1" 2.2" 🚿 Regular watering
Nov 1.7" 0" ❄️ Dormant
Dec 1.5" 0" ❄️ Dormant

Water needs are for active growing months only (Apr–Oct in Haskell County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Hostas Heat Requirements (GDD)

What are Growing Degree Days (GDD)?

Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.

Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.

Hostas needs ~1,031 GDD — county provides 2,516 GDD Excellent fit

Hostas Planting Timeline — Haskell County, KS

Hostas Planting Calendar

Activity When Date Range
Start Indoors February 7 Feb 7 – Feb 21
Transplant Outdoors April 25 Apr 25 – May 9
Bloom July 11 Jul 11 – Oct 31

Plant 1" deep · 24" apart · Rows 30" apart

Month-by-Month Timeline

MonthActivities
January
February Start Indoors
March
April Transplant Outdoors
May Transplant Outdoors
June
July Bloom
August Bloom
September Bloom
October Bloom
November
December

Growing Conditions

☀️ Sun

Partial Shade (3-6 hours)

💧 Water

1"/week · 1-2 times/week

📅 Days to Maturity

60–90 days

🧪 Soil pH

Needs 6–7.5 · Your soil: ideal

🗺️ USDA Zone

Zone 6b

📆 Growing Season

183 days in Haskell County

Growing Tips for Hostas in Haskell County

Direct sow Hostas outdoors after April 18 in Haskell County when soil has warmed and frost danger has passed.

Haskell County receives only 24" of rain annually. Hostas needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.

General growing tips

Plant bare-root crowns or divisions in early spring just as new growth emerges, or in fall at least 6 weeks before hard freeze. Choose a site with morning sun and afternoon shade in Zones 6+; deeper shade is acceptable but reduces vigor and bloom. Keep consistently moist but never waterlogged. Apply a 2–3 inch mulch layer to conserve moisture and suppress weeds. Slugs are the primary pest — use iron phosphate bait if damage is significant. Deer will browse hostas heavily in most regions; protect with fencing or repellents. Divide every 3–5 years in spring to rejuvenate. Fall planting (Zones 4+) is equally effective as spring planting when soil stays workable. Year 2+ plants reach full size and flower most reliably; first-year divisions may produce limited flower spikes.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Hostas in Haskell County, KS?

Haskell County is in Zone 6b with an average last frost of April 18. Plan your Hostas planting based on this frost date — see the calendar above for exact timing.

What planting zone is Haskell County, KS?

Haskell County, Kansas is in USDA Hardiness Zone 6b. The average last spring frost is April 18 and first fall frost is October 18.

When should I plant Hostas in Haskell County, KS?

In Haskell County, KS, plant Hostas after the last frost (around April 18) and before the first frost (around October 18). Best results when soil holds above 50°F.

What growing zone is Haskell County, KS for Hostas?

Haskell County sits in USDA Zone 6b. Hostas grows reliably in zones 3a through 9a, so it's a good fit here.

Can Hostas grow in Haskell County's climate?

Yes — Hostas grows well in Haskell County's temperate climate. Haskell County averages a 183-day frost-free season, with last frost around April 18 and first frost around October 18.

🌱

Your Haskell County Garden Planner — Free

A 22-page printable planner built for Haskell County (Zone 6b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Haskell County, KS. Local conditions may vary. Last updated: August 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.