When to plant Vinca (Annual) in Walton County, GA
Walton County's short 236-day growing season means one Vinca (Annual) planting between March 8 and March 22. No fall crop in Zone 8b.
When to Plant Vinca (Annual) in Walton County, GA
June in Walton County, Georgia — your action list
Each item below is timed to Walton County, Georgia's frost dates and soil temperatures. Skip nothing, stress about nothing.
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Collect vinca (annual) at their peak
This is the payoff month. Bring a basket, bring a friend, and get into the beds.
Get ahead of July
- First harvests: vinca (annual)
Annual vinca (Catharanthus roseus), also called Madagascar periwinkle, is one of the most heat- and drought-tolerant bedding plants available. Glossy foliage stays attractive all season while cheerful pinwheel blooms continue without deadheading. A top performer in hot, humid Southern summers where impatiens and begonias struggle. Self-cleaning; requires little maintenance once established.
Walton County, Georgia is in USDA Zone 8b. The average last spring frost is March 22 and the first fall frost is November 13, giving you a growing season of approximately 236 days.
At an elevation of 310 feet, Walton County receives approximately 61.3 inches of rainfall annually with predominantly clay loam soil. Summer highs average 90°F, providing good warmth for Vinca (Annual) during the growing season. Clay soil retains moisture well for Vinca (Annual), but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Vinca (Annual) root diseases.
Walton County Soil Profile
Soil Type
Clay Loam
Soil pH
5.4-6.3
Drainage
Well Drained
Vinca (Annual) 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.
Soil Compatibility in Walton County
How your county's soil matches Vinca (Annual)'s growing requirements.
Soil pH
Your soil pH (5.4–6.3) is more acidic than Vinca (Annual) prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
The clay loam soil in Walton County is excellent for Vinca (Annual) — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.8%). Annual compost additions will help Vinca (Annual).
How to Plant Vinca (Annual)
Succession Planting Vinca (Annual)
Sow every 8 weeks. Last sowing by Aug 15 to harvest before frost.
Vinca (Annual) Water Budget
Monthly Watering Guide for Vinca (Annual)
Vinca (Annual) needs approximately 0.5 inches of water per week (2.2" per month). Here's how your county's rainfall compares month by month.
| Month | Vinca (Annual) Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 4.8" | 0" | ❄️ Dormant |
| Feb | — | 5" | 0" | ❄️ Dormant |
| Mar | 2.2" | 5.3" | 0" | ✅ Rainfall sufficient |
| Apr | 2.2" | 4.1" | 0" | ✅ Rainfall sufficient |
| May | 2.2" | 5.3" | 0" | ✅ Rainfall sufficient |
| Jun | 2.2" | 6" | 0" | ✅ Rainfall sufficient |
| Jul | 2.2" | 7.1" | 0" | ✅ Rainfall sufficient |
| Aug | 2.2" | 5.4" | 0" | ✅ Rainfall sufficient |
| Sep | 2.2" | 4.9" | 0" | ✅ Rainfall sufficient |
| Oct | 2.2" | 3.8" | 0" | ✅ Rainfall sufficient |
| Nov | 2.2" | 4.4" | 0" | ✅ Rainfall sufficient |
| Dec | — | 5.3" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Walton County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Vinca (Annual) 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.
Vinca (Annual) Planting Timeline — Walton County, GA
Vinca (Annual) Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 11 | Jan 11 – Jan 25 |
| Transplant Outdoors | March 8 | Mar 8 – Mar 22 |
| Bloom | May 17 | May 17 – Oct 18 |
Plant 0.1" deep · 10" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors |
| February | — |
| March | Transplant Outdoors |
| April | — |
| May | Bloom |
| June | Bloom |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | Bloom |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.5"/week · Natural rainfall sufficient
📅 Days to Maturity
70–90 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 8b
📆 Growing Season
236 days in Walton County
Growing Tips for Vinca (Annual) in Walton County
Direct sow Vinca (Annual) outdoors after March 22 in Walton County when soil has warmed and frost danger has passed.
With Walton County's clay soil (31% clay), work in 3-4 inches of compost before planting Vinca (Annual). Avoid tilling when soil is wet to prevent compaction.
General growing tips
Start seeds indoors 10–12 weeks before last frost — germination requires warm soil (75–80°F) and darkness. Do not cover seeds deeply; they need just a light dusting. Direct sowing is rarely practiced due to slow seedling establishment. Transplant after soil warms and frost danger has passed. Excellent drought tolerance once established; avoid overwatering. Performs best in well-drained beds or containers in full sun.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Vinca (Annual) in Other Locations
Frequently Asked Questions
When should I plant Vinca (Annual) in Walton County, GA?
Walton County is in Zone 8b with an average last frost of March 22. Plan your Vinca (Annual) planting based on this frost date — see the calendar above for exact timing.
What planting zone is Walton County, GA?
Walton County, Georgia is in USDA Hardiness Zone 8b. The average last spring frost is March 22 and first fall frost is November 13.
When should I plant Vinca (Annual) in Walton County, GA?
In Walton County, GA, plant Vinca (Annual) after the last frost (around March 22) and before the first frost (around November 13). Best results when soil holds above 50°F.
What growing zone is Walton County, GA for Vinca (Annual)?
Walton County sits in USDA Zone 8b. Vinca (Annual) grows reliably in zones 3a through 11b, so it's a good fit here.
Can Vinca (Annual) grow in Walton County's climate?
Yes — Vinca (Annual) grows well in Walton County's temperate climate. Walton County averages a 236-day frost-free season, with last frost around March 22 and first frost around November 13.
Your Walton County Garden Planner — Free
A 22-page printable planner built for Walton County (Zone 8b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.