When to Plant Scallions in Jeff Davis County, TX
This month in Jeff Davis County, Texas
May is a pivotal month for Jeff Davis County, Texas gardens. Focus on these tasks first and you'll set up the rest of the season for success.
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Start scallions indoors
A seed-starting mix and a sunny window (or a grow light) are all you need. Keep soil warm — around 70°F — for fast germination.
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Start harvesting scallions
The more you pick, the more the plant produces. Letting fruit overripen tells the plant it's time to stop.
To set up a strong June, finish these tasks
- First harvests: scallions
Scallions (green onions) are mild-flavored alliums harvested for their slender green tops and white bases. They are quick-growing and perfect for succession planting.
Jeff Davis County, Texas is in USDA Zone 8a. The average last spring frost is April 3 and the first fall frost is November 1, giving you a growing season of approximately 212 days.
At an elevation of 4,298 feet, Jeff Davis County receives approximately 52.4 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 96°F, so Scallions may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Scallions will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Scallions root diseases.
Jeff Davis County Soil Profile
Soil Type
Sandy Loam
Soil pH
7.2-8.7
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.
Soil Compatibility in Jeff Davis County
How your county's soil matches Scallions's growing requirements.
Soil pH
Your soil pH (7.2–8.7) is more alkaline than Scallions prefers (6.0–7.0). Add sulfur or peat moss to lower pH.
Soil Texture
Sandy soil in Jeff Davis County warms quickly in spring but drains fast. Scallions will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Scallions.
Organic Matter
Organic matter is low (1.1%). Add 2-3 inches of compost before planting Scallions.
How to Plant Scallions
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Succession Planting Scallions
Sow every 5.7 weeks. Last sowing by Aug 23 to harvest before frost.
For a dedicated fall crop, sow by Aug 23.
Plant Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Scallions
Scallions needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Scallions Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 3.3" | 0" | ❄️ Dormant |
| Feb | — | 3.1" | 0" | ❄️ Dormant |
| Mar | — | 3.4" | 0" | ❄️ Dormant |
| Apr | 4.3" | 1.7" | 2.6" | 🚿 Regular watering |
| May | 4.3" | 1.3" | 3" | 🚿 Regular watering |
| Jun | 4.3" | 1.8" | 2.5" | 🚿 Regular watering |
| Jul | 4.3" | 8.1" | 0" | ✅ Rainfall sufficient |
| Aug | 4.3" | 11.6" | 0" | ✅ Rainfall sufficient |
| Sep | 4.3" | 6.6" | 0" | ✅ Rainfall sufficient |
| Oct | 4.3" | 5" | 0" | ✅ Rainfall sufficient |
| Nov | 4.3" | 3.1" | 1.2" | 💧 Light watering |
| Dec | — | 3.4" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Nov in Jeff Davis County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Scallions 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.
Scallions Planting Timeline — Jeff Davis County, TX
Scallions Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 27 | Feb 27 – Mar 13 |
| Transplant Outdoors | April 3 | Apr 3 – Apr 17 |
| Direct Sow | March 20 | Mar 20 – Apr 10 |
| Harvest | May 29 | May 29 – Jun 26 |
| Fall Sowing | August 23 | Aug 23 – Sep 6 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | Start Indoors Direct Sow |
| April | Transplant Outdoors Direct Sow |
| May | Harvest |
| June | Harvest |
| July | — |
| August | Fall Sowing |
| September | Fall Sowing |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · 1-2 times/week
📅 Days to Maturity
50–70 days
🧪 Soil pH
Needs 6–7 · Your soil: too_alkaline
🗺️ USDA Zone
Zone 8a
📆 Growing Season
212 days in Jeff Davis County
Growing Tips for Scallions in Jeff Davis County
Direct sow Scallions outdoors after April 03 in Jeff Davis County when soil has warmed and frost danger has passed.
Sandy soil in Jeff Davis County dries quickly — mulch Scallions with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
With summer highs reaching 96°F in Jeff Davis County, provide afternoon shade for Scallions and water deeply in the morning.
Common pests for Scallions in this region include onion maggots and thrips. Use row covers early in the season and inspect plants weekly.
General growing tips
Direct sow every 3 weeks for continuous harvest. Thin to 1 inch apart or grow in clusters. Harvest when pencil-thick by pulling or cutting at soil level.
Companion Planting
Good Companions
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Check more plant combinations with our Companion Planting Checker →
Scallions in Other Locations
Frequently Asked Questions
When should I plant Scallions in Jeff Davis County, TX?
Jeff Davis County is in Zone 8a with an average last frost of April 3. Plan your Scallions planting based on this frost date — see the calendar above for exact timing.
What planting zone is Jeff Davis County, TX?
Jeff Davis County, Texas is in USDA Hardiness Zone 8a. The average last spring frost is April 3 and first fall frost is November 1.
Your Jeff Davis County Garden Planner — Free
A 24-page printable planner built for Jeff Davis County (Zone 8a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.