When to Plant Hyssop in Washita County, OK
Hyssop is a semi-evergreen perennial herb with intense blue flower spikes that attract bees and butterflies. It has a minty, slightly bitter flavor used in liqueurs and teas.
Washita County, Oklahoma is in USDA Zone 7a. The average last spring frost is April 5 and the first fall frost is November 3, giving you a growing season of approximately 212 days.
At an elevation of 883 feet, Washita County receives approximately 33.8 inches of rainfall annually with predominantly loam soil. Summer highs average 94°F, providing good warmth for Hyssop during the growing season.
Washita County Soil Profile
Soil Type
Loam
Soil pH
6.7-7.5
Drainage
Well Drained
Plant Planting Risk Windows
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.
Plant Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Hyssop Planting Timeline — Washita County, OK
Hyssop Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | April 12 | Apr 12 – Apr 26 |
| Harvest | June 21 | Jun 21 – Aug 23 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Transplant Outdoors |
| May | — |
| June | Harvest |
| July | Harvest |
| August | Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
Low — drought tolerant
Days to Maturity
70–90 days
Soil pH
6 – 8
USDA Zone
Zone 7a
Growing Season
212 days
Growing Tips for Washita County
Start seeds indoors or direct sow in spring. Prune back in early spring to encourage bushy growth. Hyssop is drought-tolerant once established and thrives in poor soil.
Companion Planting
Good Companions
Avoid Planting Near
Level Up Your Garden
Hyssop in Other Locations
Frequently Asked Questions
When should I plant Hyssop in Washita County, OK?
Washita County is in Zone 7a with an average last frost of April 5. Plan your Hyssop planting based on this frost date — see the calendar above for exact timing.
What planting zone is Washita County, OK?
Washita County, Oklahoma is in USDA Hardiness Zone 7a. The average last spring frost is April 5 and first fall frost is November 3.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Washita County gardeners in Zone 7a organize planting dates, track what's growing, and never miss a planting window.
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