Frost Dates for Rathdrum, ID 83858
Last spring frost May 23 · First fall frost September 16 · 116 frost-free days · USDA Zone 6b
ZIP 83858 has about 20,100 people.
Short season: 116 frost-free days. Spring frost risk spans April 27–June 14 (48 days). Fall frost risk spans August 31–October 6 (36 days).
Frost probability for 83858
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | June 14 | May 23 | April 27 |
| Fall (first frost) | August 31 | September 16 | October 6 |
Dates come from NOAA 1971–2000 freeze probabilities at BAYVIEW MODEL BASIN (29.2 km away); the 50% date is the median year.
Which crops fit a 116-day season in Rathdrum
In Rathdrum (116 frost-free days, a short season), 32 of 56 planner crops fit outright, 15 get two plantings, 8 need an indoor start, 1 crop is perennial.
| Crop | Start indoors | Plant out / sow | Days you have | Verdict | Last sow date |
|---|---|---|---|---|---|
| Tomato | Apr 18 | Jun 6–Jun 13 | 74 | head-start: Even planted out Jun 6, the outdoor season is about 6 days short; choose an early variety or grow under cover. | — |
| Pepper | Apr 11 | Jun 6–Jun 13 | 74 | head-start: Even planted out Jun 6, the outdoor season is about 1 days short; choose an early variety or grow under cover. | — |
| Lettuce | Mar 28 | Apr 25–May 2 | 151 | two-plantings: Plant Apr 25 and again by Jul 26; both mature before Sep 23. | Jul 26 |
| Carrots | — | May 2–May 9 | 158 | fits: 70 days to maturity, 158 available after May 2. | Jul 15 |
| Cucumber | May 2 | Jun 6–Jun 13 | 88 | fits: 60 days to maturity, 88 available after Jun 6. | Jun 20 |
| Beans | — | May 30–Jun 13 | 102 | fits: 60 days to maturity, 102 available after May 30. | Jun 27 |
| Peas | — | Mar 28–Jun 6 | 179 | fits: 65 days to maturity, 179 available after Mar 28. | Jul 6 |
| Zucchini | May 9 | Jun 6–Jun 13 | 88 | fits: 55 days to maturity, 88 available after Jun 6. | Jun 25 |
| Onion | Feb 28 | Apr 25–May 9 | 151 | fits: 100 days to maturity, 151 available after Apr 25. | — |
| Spinach | — | Mar 28–May 16 | 193 | two-plantings: Plant Mar 28 and again by Aug 14; both mature before Oct 7. | Aug 14 |
| Kale | Mar 14 | Apr 25–May 9 | 165 | two-plantings: Plant Apr 25 and again by Jul 30; both mature before Oct 7. | Jul 30 |
| Broccoli | Mar 28 | Apr 25–May 9 | 151 | fits: 80 days to maturity, 151 available after Apr 25. | Jun 21 |
| Cabbage | Mar 28 | Apr 25–May 9 | 165 | fits: 70 days to maturity, 165 available after Apr 25. | Jul 15 |
| Radish | — | Mar 28–Jun 20 | 179 | two-plantings: Plant Mar 28 and again by Aug 15; both mature before Sep 23. | Aug 15 |
| Beets | — | Mar 28–Jun 20 | 179 | two-plantings: Plant Mar 28 and again by Jul 16; both mature before Sep 23. | Jul 16 |
| Potatoes | — | May 9–May 16 | 137 | fits: 90 days to maturity, 137 available after May 9. | — |
| Garlic | — | Sep 16 | 221 | overwinter: Plant Sep 16 to Oct 7; harvest the following summer. | Oct 7 |
| Strawberry | — | Apr 18–Jun 13 | 172 | perennial: A perennial: plant Apr 18; it fruits from the following year and keeps producing for several years. | — |
| Corn | Apr 25 | May 30–Jun 6 | 88 | fits: 75 days to maturity, 88 available after May 30. | — |
| Pumpkin | May 9 | Jun 6–Jun 6 | 81 | head-start: Even planted out Jun 6, the outdoor season is about 19 days short; choose an early variety or grow under cover. | — |
| Cauliflower | Apr 11 | May 16–May 30 | 130 | fits: 75 days to maturity, 130 available after May 16. | Jun 26 |
| Swiss Chard | Mar 28 | May 9–May 9 | 137 | two-plantings: Plant May 9 and again by Jul 16; both mature before Sep 23. | Jul 16 |
| Arugula | — | Mar 28–Jun 20 | 193 | two-plantings: Plant Mar 28 and again by Aug 14; both mature before Oct 7. | Aug 14 |
| Brussel Sprouts | Mar 28 | Apr 25–May 9 | 165 | fits: 100 days to maturity, 165 available after Apr 25. | Jun 15 |
| Butternut Squash | May 9 | Jun 6–Jun 13 | 81 | head-start: Even planted out Jun 6, the outdoor season is about 19 days short; choose an early variety or grow under cover. | — |
| Eggplant | Apr 4 | Jun 6–Jun 13 | 74 | fits: 70 days to maturity, 74 available after Jun 6. | — |
| Okra | Apr 25 | May 30–Jun 6 | 95 | fits: 55 days to maturity, 95 available after May 30. | Jun 25 |
| Basil | Apr 18 | Jun 13–Jun 13 | 81 | fits: 60 days to maturity, 81 available after Jun 13. | Jun 20 |
| Cilantro | — | Apr 25–May 16 | 151 | two-plantings: Plant Apr 25 and again by Jul 21; both mature before Sep 23. | Jul 21 |
| Parsley | Mar 14 | May 30–Jun 6 | 116 | fits: 70 days to maturity, 116 available after May 30. | Jul 1 |
| Celery | Mar 14 | May 30–Jun 13 | 116 | head-start: Even planted out May 30, the outdoor season is about 4 days short; choose an early variety or grow under cover. | — |
| Scallions | Mar 14 | Apr 25–May 9 | 165 | two-plantings: Plant Apr 25 and again by Jul 25; both mature before Oct 7. | Jul 25 |
| Turnip | — | Apr 25–May 9 | 165 | two-plantings: Plant Apr 25 and again by Aug 4; both mature before Oct 7. | Aug 4 |
| Kohlrabi | — | Apr 11–Apr 25 | 179 | two-plantings: Plant Apr 11 and again by Jul 30; both mature before Oct 7. | Jul 30 |
| Bok Choy | Apr 25 | May 16–May 23 | 130 | two-plantings: Plant May 16 and again by Jul 26; both mature before Sep 23. | Jul 26 |
| Collards | Mar 14 | Apr 25–May 9 | 165 | two-plantings: Plant Apr 25 and again by Jul 25; both mature before Oct 7. | Jul 25 |
| Cantaloupe | May 9 | Jun 6–Jun 13 | 74 | head-start: Even planted out Jun 6, the outdoor season is about 11 days short; choose an early variety or grow under cover. | — |
| Chives | Feb 28 | May 30–Jun 6 | 130 | fits: 90 days to maturity, 130 available after May 30. | — |
| Dill | — | Mar 28–Jun 20 | 179 | two-plantings: Plant Mar 28 and again by Jul 16; both mature before Sep 23. | Jul 16 |
| Oregano | Mar 14 | May 30–Jun 6 | 130 | fits: 80 days to maturity, 130 available after May 30. | — |
| Rosemary | Feb 28 | May 30–Jun 6 | 116 | fits: 80 days to maturity, 116 available after May 30. | — |
| Sage | Mar 28 | May 30–Jun 6 | 130 | fits: 75 days to maturity, 130 available after May 30. | — |
| Thyme | Mar 14 | May 30–Jun 6 | 130 | fits: 90 days to maturity, 130 available after May 30. | — |
| Calendula | Apr 11 | May 9–May 23 | 137 | two-plantings: Plant May 9 and again by Jul 21; both mature before Sep 23. | Jul 21 |
| Cosmos | Apr 25 | May 23–Jun 6 | 102 | fits: 60 days to maturity, 102 available after May 23. | Jun 20 |
| Lavender | Feb 28 | May 23–Jun 6 | 137 | fits: 90 days to maturity, 137 available after May 23. | — |
| Marigolds | Apr 11 | May 23–May 30 | 102 | fits: 50 days to maturity, 102 available after May 23. | Jun 30 |
| Melons | May 9 | Jun 6–Jun 13 | 74 | head-start: Even planted out Jun 6, the outdoor season is about 11 days short; choose an early variety or grow under cover. | — |
| Mint | — | May 23–Jun 6 | 137 | fits: 90 days to maturity, 137 available after May 23. | — |
| Nasturtiums | Apr 25 | May 23–May 30 | 102 | fits: 55 days to maturity, 102 available after May 23. | Jun 25 |
| Pole Beans | — | May 30–Jun 13 | 95 | fits: 65 days to maturity, 95 available after May 30. | Jun 15 |
| Spaghetti Squash | May 9 | Jun 6–Jun 13 | 81 | head-start: Even planted out Jun 6, the outdoor season is about 9 days short; choose an early variety or grow under cover. | — |
| Sunflowers | — | May 23–Jun 6 | 102 | fits: 70 days to maturity, 102 available after May 23. | Jun 10 |
| Tomatillos | Mar 28 | May 30–Jun 6 | 81 | fits: 75 days to maturity, 81 available after May 30. | — |
| Watermelon | May 9 | May 30–Jun 6 | 81 | fits: 80 days to maturity, 81 available after May 30. | — |
| Yellow Squash | May 9 | Jun 6–Jun 13 | 88 | fits: 55 days to maturity, 88 available after Jun 6. | Jun 25 |
| Zinnias | Apr 25 | May 23–Jun 6 | 102 | fits: 60 days to maturity, 102 available after May 23. | Jun 20 |
Month by month in Rathdrum
| Month | What to do |
|---|---|
| January | Plan your garden layout and order seeds. Research varieties suited to your frost dates. |
| February | Start indoors: Chives (Feb 28), Lavender (Feb 28), Onion (Feb 28), Rosemary (Feb 28). |
| March | Start indoors: Celery (Mar 14), Collards (Mar 14), Kale (Mar 14), Oregano (Mar 14), Parsley (Mar 14), Scallions (Mar 14), +8 more. Direct sow from: Arugula (Mar 28), Beets (Mar 28), Dill (Mar 28), Peas (Mar 28), Radish (Mar 28), Spinach (Mar 28). |
| April | Start indoors: Eggplant (Apr 4), Calendula (Apr 11), Cauliflower (Apr 11), Marigolds (Apr 11), Pepper (Apr 11), Basil (Apr 18), +7 more. Direct sow from: Kohlrabi (Apr 11), Cilantro (Apr 25), Turnip (Apr 25). Transplant from: Broccoli (Apr 25), Brussel Sprouts (Apr 25), Cabbage (Apr 25), Collards (Apr 25), Kale (Apr 25), Lettuce (Apr 25), +2 more. Plant: Strawberry (Apr 18). |
| May | Start indoors: Cucumber (May 2), Butternut Squash (May 9), Cantaloupe (May 9), Melons (May 9), Pumpkin (May 9), Spaghetti Squash (May 9), +3 more. Direct sow from: Carrots (May 2), Potatoes (May 9), Sunflowers (May 23), Beans (May 30), Pole Beans (May 30). Transplant from: Calendula (May 9), Swiss Chard (May 9), Bok Choy (May 16), Cauliflower (May 16), Cosmos (May 23), Lavender (May 23), +15 more. Last frost around May 23. |
| June | Transplant from: Butternut Squash (Jun 6), Cantaloupe (Jun 6), Cucumber (Jun 6), Eggplant (Jun 6), Melons (Jun 6), Pepper (Jun 6), +6 more. Last sowing dates: Sunflowers (Jun 10), Brussel Sprouts (Jun 15), Pole Beans (Jun 15), Basil (Jun 20), Cosmos (Jun 20), Cucumber (Jun 20), +9 more. |
| July | Last sowing dates: Parsley (Jul 1), Peas (Jul 6), Cabbage (Jul 15), Carrots (Jul 15), Beets (Jul 16), Dill (Jul 16), +9 more. |
| August | Last sowing dates: Turnip (Aug 4), Arugula (Aug 14), Spinach (Aug 14), Radish (Aug 15). |
| September | Direct sow from: Garlic (Sep 16). First frost around September 16. |
| October | Last sowing dates: Garlic (Oct 7). |
| November | Clean up spent plants. Add compost to beds. Rest, review, and plan next year's garden. |
| December | Clean up spent plants. Add compost to beds. Rest, review, and plan next year's garden. |
Frequently Asked Questions
What is the last frost date for Rathdrum, ID (ZIP 83858)?
The median last spring frost date for Rathdrum, ID (ZIP code 83858) is around May 23. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area. One year in ten frost ends before April 27; one in ten it runs past June 14.
What is the first fall frost date in Rathdrum, ID?
The median first fall frost date for Rathdrum, ID is around September 16. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses. The first frost arrives around August 31 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Rathdrum, ID?
The frost-free growing season in Rathdrum is about 116 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side. In Rathdrum (116 frost-free days, a short season), 32 of 56 planner crops fit outright, 15 get two plantings, 8 need an indoor start, 1 crop is perennial.
What USDA hardiness zone is Rathdrum, ID?
Rathdrum, ID is in USDA hardiness zone 6b (2023 USDA Plant Hardiness Zone Map). Zones come from the average coldest winter temperature, so they tell you which perennials survive the winter; the frost dates on this page tell you when to plant.
When should I start tomatoes indoors in Rathdrum, ID?
Start tomatoes indoors Apr 18 and plant out Jun 6 in Rathdrum. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Rathdrum?
Two: plant Apr 25 and again by Jul 26; both mature before Sep 23.
When do I plant garlic in Rathdrum?
Sep 16 to Oct 7; it overwinters and is ready the following summer.
Can I grow Celery in Rathdrum?
Yes, with help. Even planted out May 30, the outdoor season is about 4 days short; choose an early variety or grow under cover.
Which nearby ZIP has a longer season?
Coeur D Alene (ZIP 83815) has 130 frost-free days, 14 more than Rathdrum (ZIP 83858). See Coeur D Alene ZIP 83815 frost dates
Nearby and related
- Frost dates for Post Falls, ID 83854 (9.3 mi)
- Frost dates for Coeur D Alene, ID 83815 (10.3 mi)
- Frost dates for Hayden, ID 83835 (11.5 mi)
- Frost dates for Coeur D Alene, ID 83814 (16.3 mi)
- Frost dates for Liberty Lake, WA 99019 (16.6 mi)
- When to plant in ID
- When to plant Beans in ID
- When to plant Strawberries in ID
- When to plant Beets in ID
- When to plant Broccoli in ID
- When to plant Carrots in ID
- When to plant Kale in ID
- Look up another ZIP