When to plant Petunia in Rooks County, KS
Rooks County's 176-day season only supports one Petunia planting per year. Sow between April 30 and May 14 for the best chance at full maturity before October 16.
When to Plant Petunia in Rooks County, KS
Petunias (Petunia x hybrida) are warm-season tender annuals prized for their prolific, trumpet-shaped blooms in nearly every color. They perform from hanging baskets to garden borders and bloom continuously from late spring until frost, provided spent flowers are removed regularly.
Rooks County, Kansas is in USDA Zone 6a. The average last spring frost is April 23 and the first fall frost is October 16, giving you a growing season of approximately 176 days.
At an elevation of 691 feet, Rooks County receives approximately 20.4 inches of rainfall annually with predominantly loam soil. Summer highs average 85°F, providing good warmth for Petunia during the growing season.
Rooks County Soil Profile
Soil Type
Loam
Soil pH
6.3-7.7
Drainage
Well Drained
Monthly Watering Guide for Petunia
Petunia needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Petunia Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 0.5" | 0" | ❄️ Dormant |
| Feb | — | 0.7" | 0" | ❄️ Dormant |
| Mar | — | 1.5" | 0" | ❄️ Dormant |
| Apr | 4.3" | 2.2" | 2.1" | 💧 Light watering |
| May | 4.3" | 2.7" | 1.6" | 💧 Light watering |
| Jun | 4.3" | 3.8" | 0.5" | 💧 Light watering |
| Jul | 4.3" | 2.4" | 1.9" | 💧 Light watering |
| Aug | 4.3" | 2.5" | 1.8" | 💧 Light watering |
| Sep | 4.3" | 1.7" | 2.6" | 🚿 Regular watering |
| Oct | 4.3" | 1.2" | 3.1" | 🚿 Regular watering |
| Nov | — | 0.8" | 0" | ❄️ Dormant |
| Dec | — | 0.5" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Rooks County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Petunia Planting Timeline — Rooks County, KS
Petunia Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 26 | Feb 26 – Mar 12 |
| Transplant Outdoors | April 30 | Apr 30 – May 14 |
| Bloom | July 9 | Jul 9 – Oct 15 |
· 12" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | Start Indoors |
| April | Transplant Outdoors |
| May | Transplant Outdoors |
| June | — |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | Bloom |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
70–90 days
🧪 Soil pH
Needs 6–7 · Your soil: N/A
🗺️ USDA Zone
Zone 6a
📆 Growing Season
176 days in Rooks County
Growing Tips for Rooks County
Start seeds indoors 8–10 weeks before last frost; seeds need light to germinate — press onto moist mix surface, do not cover. Transplant after last frost once nights stay above 50°F. Pinch back leggy plants mid-summer to encourage bushy re-bloom. Wave/spreading types tolerate light shade but bloom less. Feed every 2 weeks with balanced fertilizer once established.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Petunia in Other Locations
Frequently Asked Questions
When should I plant Petunia in Rooks County, KS?
Rooks County is in Zone 6a with an average last frost of April 23. Plan your Petunia planting based on this frost date — see the calendar above for exact timing.
What planting zone is Rooks County, KS?
Rooks County, Kansas is in USDA Hardiness Zone 6a. The average last spring frost is April 23 and first fall frost is October 16.
When should I plant Petunia in Rooks County, KS?
In Rooks County, KS, plant Petunia after the last frost (around April 23) and before the first frost (around October 16). Best results when soil holds above 50°F.
What growing zone is Rooks County, KS for Petunia?
Rooks County sits in USDA Zone 6a. Petunia grows reliably in zones 2a through 11b, so it's a good fit here.
Can Petunia grow in Rooks County's climate?
Yes — Petunia grows well in Rooks County's temperate climate. Rooks County averages a 176-day frost-free season, with last frost around April 23 and first frost around October 16.
Your Rooks County Garden Planner — Free
A 22-page printable planner built for Rooks County (Zone 6a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.