When to plant Sweet Alyssum in Leon County County,
In Leon County County, plant Sweet Alyssum in spring between January 14 and February 4, once soil temps hold above 50°F. Leon County County's last frost averages March 11, so aim for a steady week of warm soil before planting. For a fall crop, sow between September 12 and September 26 — roughly 60 days before the first frost on November 21.
When to Plant Sweet Alyssum in Leon County, FL
This month in Leon County, Florida
If you only do a handful of things in the garden this June, make it these. They're sequenced around your zone's frost timing.
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It's harvest week for sweet alyssum
Check every 1–2 days. Many of these get tough or go to seed if you wait too long.
Looking ahead to July
- 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.
Leon County, Florida is in USDA Zone 9a. The average last spring frost is March 11 and the first fall frost is November 21, giving you a growing season of approximately 255 days.
At an elevation of 250 feet, Leon County receives approximately 53.9 inches of rainfall annually with predominantly sand soil. Summer highs average 95°F, so Sweet Alyssum may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Sweet Alyssum will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Sweet Alyssum root diseases.
Leon County Soil Profile
Soil Type
Sand
Soil pH
4.8-5.7
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 Leon County
How your county's soil matches Sweet Alyssum's growing requirements.
Soil pH
Your soil pH (4.8–5.7) is more acidic than Sweet Alyssum prefers (6.0–7.5). Add garden lime to raise pH.
Soil Texture
Sandy soil in Leon County warms quickly in spring but drains fast. Sweet Alyssum will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Sweet Alyssum.
Organic Matter
Organic matter is low (1.3%). Add 2-3 inches of compost before planting Sweet Alyssum.
How to Plant Sweet Alyssum
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Succession Planting Sweet Alyssum
Sow every 5.1 weeks. Last sowing by Sep 22 to harvest before frost.
For a dedicated fall crop, sow by Sep 12.
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 | — | 2.2" | 0" | ❄️ Dormant |
| Feb | — | 3.3" | 0" | ❄️ Dormant |
| Mar | 2.2" | 3" | 0" | ✅ Rainfall sufficient |
| Apr | 2.2" | 2.4" | 0" | ✅ Rainfall sufficient |
| May | 2.2" | 4.1" | 0" | ✅ Rainfall sufficient |
| Jun | 2.2" | 7.2" | 0" | ✅ Rainfall sufficient |
| Jul | 2.2" | 7.6" | 0" | ✅ Rainfall sufficient |
| Aug | 2.2" | 7.5" | 0" | ✅ Rainfall sufficient |
| Sep | 2.2" | 6.9" | 0" | ✅ Rainfall sufficient |
| Oct | 2.2" | 5.2" | 0" | ✅ Rainfall sufficient |
| Nov | 2.2" | 2.1" | 0.1" | 💧 Light watering |
| Dec | — | 2.6" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Leon 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 — Leon County, FL
Sweet Alyssum Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | February 11 | Feb 11 – Feb 25 |
| Direct Sow | January 14 | Jan 14 – Feb 4 |
| Bloom | March 18 | Mar 18 – Jul 1 |
| Fall Sowing | September 12 | Sep 12 – Sep 26 |
· 6" apart · Rows 8" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Direct Sow |
| February | Transplant Outdoors Direct Sow |
| March | Bloom |
| April | Bloom |
| May | Bloom |
| June | Bloom |
| July | Bloom |
| August | — |
| September | Fall Sowing |
| October | — |
| 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: too_acidic
🗺️ USDA Zone
Zone 9a
📆 Growing Season
255 days in Leon County
Growing Tips for Sweet Alyssum in Leon County
Direct sow Sweet Alyssum outdoors after March 11 in Leon County when soil has warmed and frost danger has passed.
Sandy soil in Leon County dries quickly — mulch Sweet Alyssum with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
Your generous 255.0-day season in Leon 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 Leon County, FL?
Leon County is in Zone 9a with an average last frost of March 11. Plan your Sweet Alyssum planting based on this frost date — see the calendar above for exact timing.
What planting zone is Leon County, FL?
Leon County, Florida is in USDA Hardiness Zone 9a. The average last spring frost is March 11 and first fall frost is November 21.
When should I plant Sweet Alyssum in Leon County County, ?
In Leon County County, , plant Sweet Alyssum after the last frost (around March 11) and before the first frost (around November 21). Best results when soil holds above 50°F.
What growing zone is Leon County County, for Sweet Alyssum?
Leon County County sits in USDA Zone 9a. Sweet Alyssum grows reliably in zones 3a through 11b, so it's a good fit here.
Can Sweet Alyssum grow in Leon County County's climate?
Yes — Sweet Alyssum grows well in Leon County County's temperate climate. Leon County County averages a 255-day frost-free season, with last frost around March 11 and first frost around November 21.
Your Leon County Garden Planner — Free
A 22-page printable planner built for Leon County (Zone 9a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.