When to plant Lentils in Ada County, ID
Ada County gardeners should plant Lentils between April 9 and April 30 in spring. With Ada County's Zone 7a climate (last frost April 23), Lentils needs 80–110 days to mature — plant by June 28 for a full harvest. A second sowing from August 7 to August 21 extends the harvest into fall.
When to Plant Lentils in Ada County, ID
Your June planting checklist for Ada County, Idaho
Here's what deserves your attention in Ada County, Idaho this month. Everything below is tailored to Zone 7a and timed around your local frost dates.
A few tasks this June that'll pay off in July
- First harvests: lentils
Lentils are an ancient pulse crop producing small, lens-shaped seeds packed with protein and iron. They grow on short, bushy plants and are surprisingly easy to cultivate.
Ada County, Idaho is in USDA Zone 7a. The average last spring frost is April 23 and the first fall frost is October 16, giving you a growing season of approximately 176 days.
At an elevation of 4,372 feet, Ada County receives approximately 19.8 inches of rainfall annually with predominantly loam soil. Summer highs average 90°F, providing good warmth for Lentils during the growing season. With low rainfall, drip irrigation is essential for growing Lentils successfully. Mulch heavily to conserve soil moisture.
Ada County Soil Profile
Soil Type
Loam
Soil pH
6.4-7.7
Drainage
Well Drained
Lentils 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 Ada County
How your county's soil matches Lentils's growing requirements.
Soil pH
Your soil pH (6.4–7.7) is within Lentils's preferred range (6.0–8.0).
Soil Texture
The loam soil in Ada County is excellent for Lentils — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.3%). Annual compost additions will help Lentils.
How to Plant Lentils
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Succession Planting Lentils
Sow every 9.1 weeks. Last sowing by Jun 28 to harvest before frost.
For a dedicated fall crop, sow by Aug 07.
Lentils Water Budget
Water stress score is 8/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Lentils
Lentils needs approximately 0.6 inches of water per week (2.6" per month). Here's how your county's rainfall compares month by month.
| Month | Lentils Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.4" | 0" | ❄️ Dormant |
| Feb | — | 1.2" | 0" | ❄️ Dormant |
| Mar | — | 1.5" | 0" | ❄️ Dormant |
| Apr | 2.6" | 2" | 0.6" | 💧 Light watering |
| May | 2.6" | 2.4" | 0.2" | 💧 Light watering |
| Jun | 2.6" | 1.4" | 1.2" | 💧 Light watering |
| Jul | 2.6" | 1.8" | 0.8" | 💧 Light watering |
| Aug | 2.6" | 2.4" | 0.2" | 💧 Light watering |
| Sep | 2.6" | 1.5" | 1.1" | 💧 Light watering |
| Oct | 2.6" | 1.8" | 0.8" | 💧 Light watering |
| Nov | — | 1.3" | 0" | ❄️ Dormant |
| Dec | — | 1.2" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Ada County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Lentils 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.
Lentils Planting Timeline — Ada County, ID
Lentils Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 19 | Mar 19 – Apr 2 |
| Transplant Outdoors | April 23 | Apr 23 – May 7 |
| Direct Sow | April 9 | Apr 9 – Apr 30 |
| Harvest | July 16 | Jul 16 – Aug 27 |
| Fall Sowing | August 7 | Aug 7 – Aug 21 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors Transplant Outdoors Direct Sow |
| May | Transplant Outdoors |
| June | — |
| July | Harvest |
| August | Fall Sowing Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.6"/week · Only during dry spells
📅 Days to Maturity
80–110 days
🧪 Soil pH
Needs 6–8 · Your soil: ideal
🗺️ USDA Zone
Zone 7a
📆 Growing Season
176 days in Ada County
Growing Tips for Lentils in Ada County
Direct sow Lentils outdoors after April 23 in Ada County when soil has warmed and frost danger has passed.
Common pests for Lentils in this region include bean beetles and aphids. Use row covers early in the season and inspect plants weekly.
General growing tips
Direct sow in early spring as lentils tolerate frost. Provide short supports as plants tend to lodge. Harvest when lower pods turn brown. Pull entire plants and dry in bundles.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Lentils in Other Locations
Frequently Asked Questions
When should I plant Lentils in Ada County, ID?
Ada County is in Zone 7a with an average last frost of April 23. Plan your Lentils planting based on this frost date — see the calendar above for exact timing.
What planting zone is Ada County, ID?
Ada County, Idaho is in USDA Hardiness Zone 7a. The average last spring frost is April 23 and first fall frost is October 16.
When should I plant Lentils in Ada County, ID?
In Ada County, ID, plant Lentils after the last frost (around April 23) and before the first frost (around October 16). Best results when soil holds above 50°F.
What growing zone is Ada County, ID for Lentils?
Ada County sits in USDA Zone 7a. Lentils grows reliably in zones 2a through 10b, so it's a good fit here.
Can Lentils grow in Ada County's climate?
Yes — Lentils grows well in Ada County's temperate climate. Ada County averages a 176-day frost-free season, with last frost around April 23 and first frost around October 16.
Your Ada County Garden Planner — Free
A 22-page printable planner built for Ada County (Zone 7a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.