When to plant Leeks in Macdoel, CA
For Leeks in Macdoel, the safe spring window opens around May 1 and closes around May 22. Last expected frost is May 15, first fall frost October 1, giving a 139-day growing season. A second sowing from July 23 to August 6 extends the harvest into fall.
When to Plant Leeks in Macdoel, CA
What to do in July
If you only do a handful of things in the garden this July, make it these. They're sequenced around your zone's frost timing.
-
Direct-sow leeks for cool weather
Keep young seedlings shaded and moist in summer heat. A row of taller crops works as natural shade.
Get ahead of August
- First harvests: leeks
Leeks are a mild, sweet allium that produces long white shanks. They are more refined than onions and are a key ingredient in soups, stews, and gratins.
Macdoel, California is in USDA Zone 8a. The average last spring frost is May 15 and the first fall frost is October 1, giving you a growing season of approximately 139 days.
At an elevation of 251 feet, Siskiyou County receives approximately 36 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 84°F, so choose short-season varieties of Leeks to ensure they mature before fall. Sandy soil warms quickly in spring — great for early planting — but Leeks will need more frequent watering and organic matter to retain nutrients.
Macdoel Soil Profile
Soil Type
Sandy Loam
Soil pH
6-6.9
Drainage
Well Drained
Leeks 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 Macdoel
How your county's soil matches Leeks's growing requirements.
Soil pH
Your soil pH (6.0–6.9) is within Leeks's preferred range (6.0–7.0).
Soil Texture
Sandy soil in Siskiyou County warms quickly in spring but drains fast. Leeks will need more frequent watering and regular compost additions to retain nutrients.
Organic Matter
Organic matter is moderate (2.5%). Annual compost additions will help Leeks.
How to Plant Leeks
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Leeks Water Budget
Monthly Watering Guide for Leeks
Leeks needs approximately 0.8 inches of water per week (3.5" per month). Here's how your county's rainfall compares month by month.
| Month | Leeks Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 7.3" | 0" | ❄️ Dormant |
| Feb | — | 7.1" | 0" | ❄️ Dormant |
| Mar | — | 5.3" | 0" | ❄️ Dormant |
| Apr | — | 3.3" | 0" | ❄️ Dormant |
| May | 3.5" | 1" | 2.5" | 🚿 Regular watering |
| Jun | 3.5" | 0.2" | 3.3" | 🚿 Regular watering |
| Jul | 3.5" | 0" | 3.5" | 🚿 Regular watering |
| Aug | 3.5" | 0" | 3.5" | 🚿 Regular watering |
| Sep | 3.5" | 0.4" | 3.1" | 🚿 Regular watering |
| Oct | 3.5" | 1.6" | 1.9" | 🚿 Regular watering |
| Nov | — | 3.1" | 0" | ❄️ Dormant |
| Dec | — | 6.7" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Oct in Siskiyou County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Leeks 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.
Leeks Planting Timeline — Macdoel, CA
Leeks Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | April 10 | Apr 10 – Apr 24 |
| Transplant Outdoors | May 15 | May 15 – May 29 |
| Direct Sow | May 1 | May 1 – May 22 |
| Harvest | August 14 | Aug 14 – Oct 30 |
| Fall Sowing | July 23 | Jul 23 – Aug 6 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Start Indoors |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | Fall Sowing |
| August | Fall Sowing Harvest |
| September | Harvest |
| October | Harvest |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.8"/week · Natural rainfall sufficient
📅 Days to Maturity
90–150 days
🧪 Soil pH
Needs 6–7 · Your soil: ideal
🗺️ USDA Zone
Zone 8a
📆 Growing Season
139 days in Siskiyou County
Growing Tips for Leeks in Macdoel
Direct sow Leeks outdoors after May 15 in Siskiyou County when soil has warmed and frost danger has passed.
Sandy soil in Siskiyou County dries quickly — mulch Leeks with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
Your 139.0-day growing season in Siskiyou County is tight for Leeks (90.0-150.0 days to maturity). Start indoors and choose early-maturing varieties.
Common pests for Leeks in this region include onion maggots and thrips. Use row covers early in the season and inspect plants weekly.
General growing tips
Start seeds indoors 10-12 weeks before last frost. Transplant into trenches and hill soil around stems as they grow to increase the white portion. Harvest as needed.
Companion Planting
Good Companions
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Check more plant combinations with our Companion Planting Checker →
Leeks in Other Locations
When should I plant Leeks in Macdoel, CA?
In Macdoel, CA, plant Leeks after the last frost (around May 15) and before the first frost (around October 1). Best results when soil holds above 50°F.
What growing zone is Macdoel, CA for Leeks?
Macdoel sits in USDA Zone 8a. Leeks grows reliably in zones 3a through 10b, so it's a good fit here.
Can Leeks grow in Macdoel's climate?
Yes — Leeks grows well in Macdoel's temperate climate. Macdoel averages a 139-day frost-free season, with last frost around May 15 and first frost around October 1.
Your Siskiyou County Garden Planner — Free
A 22-page printable planner built for Siskiyou 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.