When to plant Sweet Alyssum in Jackson County County,
Plant Sweet Alyssum in Jackson County County from March 10 to March 31 in spring. Jackson County County sits in USDA Zone 7b, with last frost around April 7 and first frost on October 29. A second sowing from September 17 to October 1 extends the harvest into fall.
When to Plant Sweet Alyssum in Jackson County, AL
Your June gardening checklist
June is a pivotal month for Jackson County, Alabama gardens. Focus on these tasks first and you'll set up the rest of the season for success.
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Basket week: sweet alyssum
Check every 1–2 days. Many of these get tough or go to seed if you wait too long.
Before July arrives, get these ready
- First harvests: sweet alyssum
Sweet Alyssum (Lobularia maritima) is a low-growing cool-season annual prized for its honey-scented clusters of tiny white, pink, or purple flowers. A workhorse border plant, it tolerates light frost, self-seeds readily, and attracts beneficial insects throughout its bloom season. In warm climates it often re-blooms in fall after summer heat fades.
Jackson County, Alabama is in USDA Zone 7b. The average last spring frost is April 7 and the first fall frost is October 29, giving you a growing season of approximately 205 days.
At an elevation of 302 feet, Jackson County receives approximately 59.3 inches of rainfall annually with predominantly clay loam soil. Summer highs average 93°F, providing good warmth for Sweet Alyssum during the growing season. Clay soil retains moisture well for Sweet Alyssum, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Sweet Alyssum root diseases.
Jackson County Soil Profile
Soil Type
Clay Loam
Soil pH
5.5-6.5
Drainage
Well Drained
Sweet Alyssum 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 Jackson County
How your county's soil matches Sweet Alyssum's growing requirements.
Soil pH
Your soil pH (5.5–6.5) overlaps with Sweet Alyssum's range (6.0–7.5), though not a perfect match.
Soil Texture
The clay loam soil in Jackson County is excellent for Sweet Alyssum — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Sweet Alyssum prefers dry conditions but your soil drains poorly. Use raised beds or mounded rows to prevent root rot.
Organic Matter
Organic matter is moderate (2.6%). Annual compost additions will help Sweet Alyssum.
How to Plant Sweet Alyssum
Fall planting: Sow 6 weeks before your first frost date for a fall harvest.
Succession Planting Sweet Alyssum
Sow every 5.1 weeks. Last sowing by Aug 30 to harvest before frost.
For a dedicated fall crop, sow by Sep 17.
Sweet Alyssum Water Budget
Monthly Watering Guide for Sweet Alyssum
Sweet Alyssum 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 | Sweet Alyssum Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 4.9" | 0" | ❄️ Dormant |
| Feb | — | 4.4" | 0" | ❄️ Dormant |
| Mar | — | 4.9" | 0" | ❄️ Dormant |
| Apr | 2.2" | 4.9" | 0" | ✅ Rainfall sufficient |
| May | 2.2" | 4.6" | 0" | ✅ Rainfall sufficient |
| Jun | 2.2" | 4.7" | 0" | ✅ Rainfall sufficient |
| Jul | 2.2" | 6.7" | 0" | ✅ Rainfall sufficient |
| Aug | 2.2" | 5.9" | 0" | ✅ Rainfall sufficient |
| Sep | 2.2" | 4.5" | 0" | ✅ Rainfall sufficient |
| Oct | 2.2" | 4.1" | 0" | ✅ Rainfall sufficient |
| Nov | — | 4.5" | 0" | ❄️ Dormant |
| Dec | — | 5.2" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Jackson County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Sweet Alyssum 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.
Sweet Alyssum Planting Timeline — Jackson County, AL
Sweet Alyssum Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 24 | Feb 24 – Mar 10 |
| Transplant Outdoors | April 7 | Apr 7 – Apr 21 |
| Direct Sow | March 10 | Mar 10 – Mar 31 |
| Bloom | May 19 | May 19 – Aug 25 |
| Fall Sowing | September 17 | Sep 17 – Oct 1 |
· 6" apart · Rows 8" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | Start Indoors Direct Sow |
| April | Transplant Outdoors |
| May | Bloom |
| June | Bloom |
| July | Bloom |
| August | Bloom |
| September | Fall Sowing |
| October | Fall Sowing |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.5"/week · Natural rainfall sufficient
📅 Days to Maturity
45–60 days
🧪 Soil pH
Needs 6–7.5 · Your soil: acceptable
🗺️ USDA Zone
Zone 7b
📆 Growing Season
205 days in Jackson County
Growing Tips for Sweet Alyssum in Jackson County
Direct sow Sweet Alyssum outdoors after April 07 in Jackson County when soil has warmed and frost danger has passed.
With Jackson County's clay soil (28% clay), work in 3-4 inches of compost before planting Sweet Alyssum. Avoid tilling when soil is wet to prevent compaction.
Your generous 205.0-day season in Jackson County allows multiple plantings of Sweet Alyssum. Sow every 22.0 days for continuous harvest.
Common pests for Sweet Alyssum in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.
General growing tips
Surface-sow seeds — they need light to germinate. Direct-sow as soon as soil can be worked in spring; in zones 7+ also sow in fall. Thin to 6 inches apart. Shear back hard in midsummer when heat causes dormancy — plants recover and re-bloom when cool weather returns. Self-seeds prolifically; allow a few plants to set seed for a perpetual colony.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Sweet Alyssum in Other Locations
Frequently Asked Questions
When should I plant Sweet Alyssum in Jackson County, AL?
Jackson County is in Zone 7b with an average last frost of April 7. Plan your Sweet Alyssum planting based on this frost date — see the calendar above for exact timing.
What planting zone is Jackson County, AL?
Jackson County, Alabama is in USDA Hardiness Zone 7b. The average last spring frost is April 7 and first fall frost is October 29.
When should I plant Sweet Alyssum in Jackson County County, ?
In Jackson County County, , plant Sweet Alyssum after the last frost (around April 7) and before the first frost (around October 29). Best results when soil holds above 50°F.
What growing zone is Jackson County County, for Sweet Alyssum?
Jackson County County sits in USDA Zone 7b. Sweet Alyssum grows reliably in zones 3a through 11b, so it's a good fit here.
Can Sweet Alyssum grow in Jackson County County's climate?
Yes — Sweet Alyssum grows well in Jackson County County's temperate climate. Jackson County County averages a 205-day frost-free season, with last frost around April 7 and first frost around October 29.
Your Jackson County Garden Planner — Free
A 22-page printable planner built for Jackson 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.