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When to Plant Haskaps in Cleveland County, OK

Cleveland County, Oklahoma Zone 7b May

May to-do list for Cleveland County, Oklahoma

May is a pivotal month for Cleveland County, Oklahoma gardens. Focus on these tasks first and you'll set up the rest of the season for success.

Avg. last frost April 2
Avg. first frost November 5
Soil temp (4") 70°F
Watering Low
Pest pressure Moderate
Daylight 13.9 hrs

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Haskaps (honeyberries) are extremely cold-hardy shrubs producing elongated blue berries with a complex blueberry-raspberry flavor. They fruit very early in the season.

Cleveland County, Oklahoma is in USDA Zone 7b. The average last spring frost is April 2 and the first fall frost is November 5, giving you a growing season of approximately 217 days.

At an elevation of 931 feet, Cleveland County receives approximately 26.4 inches of rainfall annually with predominantly loam soil. Summer highs average 94°F, providing good warmth for Haskaps during the growing season.

Cleveland County, OK (Zone 7b) Long season
217 days
Last Spring Frost April 2
217 growing days
First Fall Frost November 5
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Cleveland County Soil Profile

Soil Type

Loam

Soil pH

6.5-7.4

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season
Transplant: Apr 11
Recommended (50%) ✓ Fits season
Transplant: Apr 23
Safe Start (90%) ✓ Fits season
Transplant: May 6

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 Cleveland County

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

Soil pH

Your soil pH (6.5–7.4) is within Haskaps's preferred range (5.5–7.5).

Soil Texture

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

Organic Matter

Organic matter is excellent (4.1%) — Haskaps will thrive.

How to Plant Haskaps

48"
Between Plants
72"
Between Rows

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.5″/week
You supply
0.6″/week
Watering frequency 1-2 times/week
Season total 1,133 gal / 100 sq ft
Drought risk

Water stress score is 6/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Haskaps

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

Month Haskaps Needs Rainfall You Supplement Action
Jan 0.7" 0" ❄️ Dormant
Feb 0.9" 0" ❄️ Dormant
Mar 1.8" 0" ❄️ Dormant
Apr 4.3" 2.7" 1.6" 💧 Light watering
May 4.3" 4.5" 0" ✅ Rainfall sufficient
Jun 4.3" 3.7" 0.6" 💧 Light watering
Jul 4.3" 3.8" 0.5" 💧 Light watering
Aug 4.3" 2.9" 1.4" 💧 Light watering
Sep 4.3" 2.2" 2.1" 💧 Light watering
Oct 4.3" 1.6" 2.7" 🚿 Regular watering
Nov 4.3" 0.9" 3.4" 🚿 Regular watering
Dec 0.6" 0" ❄️ Dormant

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

Haskaps 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.

Haskaps needs ~18,706 GDD — county provides 4,448 GDD May not mature

Haskaps Planting Timeline — Cleveland County, OK

Haskaps Planting Calendar

Activity When Date Range
Transplant Outdoors April 23 Apr 23 – May 7

· 48" apart · Rows 72" apart

Month-by-Month Timeline

MonthActivities
January
February
March
April Transplant Outdoors
May Transplant Outdoors
June
July
August
September
October
November
December
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Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · 1-2 times/week

📅 Days to Maturity

730–1095 days

🧪 Soil pH

Needs 5.5–7.5 · Your soil: ideal

🗺️ USDA Zone

Zone 7b

📆 Growing Season

217 days in Cleveland County

Growing Tips for Haskaps in Cleveland County

Direct sow Haskaps outdoors after April 02 in Cleveland County when soil has warmed and frost danger has passed.

Your 217.0-day growing season in Cleveland County is tight for Haskaps (730.0-1095.0 days to maturity). Start indoors and choose early-maturing varieties.

General growing tips

Plant at least two different varieties for cross-pollination. Fruits ripen 2-3 weeks before strawberries. Protect from birds. Very low maintenance once established. Tolerates extreme cold.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Haskaps in Cleveland County, OK?

Cleveland County is in Zone 7b with an average last frost of April 2. Plan your Haskaps planting based on this frost date — see the calendar above for exact timing.

What planting zone is Cleveland County, OK?

Cleveland County, Oklahoma is in USDA Hardiness Zone 7b. The average last spring frost is April 2 and first fall frost is November 5.

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Your Cleveland County Garden Planner — Free

A 24-page printable planner built for Cleveland County (Zone 7b). 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 Cleveland County, OK. Local conditions may vary. Last updated: May 2026.

Sources & credits

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