Planting Calendar for ZIP 91931
Based on your local frost dates - last spring frost around Apr 22, first fall frost around Nov 8 - here is when to plant 79 common crops near ZIP 91931.
Last spring frost
Apr 22
First fall frost
Nov 8
Hardiness zone
8b
Vegetables
| Crop | Start seeds indoors | Plant outside | Fall planting by |
|---|---|---|---|
| Tomatoes | Mar 11 | Apr 29 (Transplant out) | - |
| Peppers | Feb 25 | May 6 (Transplant out) | - |
| Cucumbers | Apr 1 | Apr 29 (Transplant out) | Aug 31 |
| Zucchini | Apr 1 | Apr 29 (Transplant out) | Sep 5 |
| Summer Squash | Apr 1 | Apr 29 (Transplant out) | Sep 3 |
| Winter Squash | Apr 1 | Apr 29 (Transplant out) | - |
| Pumpkins | Apr 1 | Apr 29 (Transplant out) | - |
| Green Beans | - | Apr 22 (Direct sow) | Aug 31 |
| Sweet Corn | - | Apr 29 (Direct sow) | - |
| Melons | Apr 1 | May 6 (Transplant out) | - |
| Watermelon | Apr 1 | May 6 (Transplant out) | - |
| Okra | - | May 6 (Direct sow) | - |
| Eggplant | Feb 25 | May 6 (Transplant out) | - |
| Lettuce | Mar 25 | Mar 25 (Transplant out) | Sep 5 |
| Spinach | - | Mar 11 (Direct sow) | Sep 10 |
| Kale | Mar 11 | Apr 1 (Transplant out) | Aug 31 |
| Peas | - | Mar 11 (Direct sow) | Aug 26 |
| Carrots | - | Apr 1 (Direct sow) | Aug 16 |
| Beets | - | Mar 25 (Direct sow) | Aug 31 |
| Radishes | - | Mar 25 (Direct sow) | Sep 27 |
| Broccoli | Mar 11 | Apr 8 (Transplant out) | Aug 21 |
| Cauliflower | Mar 11 | Apr 8 (Transplant out) | Aug 16 |
| Cabbage | Mar 11 | Apr 1 (Transplant out) | Aug 16 |
| Onions | Feb 11 | Mar 25 (Transplant out) | - |
| Potatoes | - | Apr 8 (Direct sow) | - |
| Swiss Chard | Mar 25 | Apr 8 (Transplant out) | Aug 31 |
| Sweet Potatoes | - | May 13 (Direct sow) | - |
| Brussels Sprouts | Mar 11 | Apr 8 (Transplant out) | Jul 17 |
| Celery | Feb 11 | Apr 29 (Transplant out) | - |
| Leeks | Feb 11 | Apr 8 (Transplant out) | Jun 27 |
| Turnips | - | Apr 8 (Direct sow) | Sep 5 |
| Rutabaga | - | Apr 22 (Direct sow) | Jul 22 |
| Parsnips | - | Apr 8 (Direct sow) | Jun 27 |
| Kohlrabi | Mar 25 | Apr 8 (Transplant out) | Aug 31 |
| Collard Greens | Mar 11 | Apr 8 (Transplant out) | Aug 21 |
| Mustard Greens | - | Apr 8 (Direct sow) | Sep 10 |
| Arugula | - | Apr 8 (Direct sow) | Sep 15 |
| Bok Choy | Mar 25 | Apr 8 (Transplant out) | Sep 5 |
| Green Onions | - | Apr 8 (Direct sow) | Aug 26 |
| Tomatillos | Mar 11 | Apr 29 (Transplant out) | - |
| Fennel | Mar 25 | Apr 8 (Transplant out) | Aug 6 |
| Popcorn | Apr 22 | May 6 (Transplant out) | - |
| Black-Eyed Peas | Apr 22 | May 6 (Transplant out) | Aug 6 |
| Lima Beans | Apr 22 | May 6 (Transplant out) | - |
| Edamame | Apr 22 | May 6 (Transplant out) | - |
| Peanuts | Apr 22 | May 6 (Transplant out) | - |
| Globe Artichoke | Feb 25 | Apr 8 (Transplant out) | Jul 27 |
| Horseradish | Apr 22 | Apr 8 (Transplant out) | - |
| Ground Cherries | Mar 11 | May 6 (Transplant out) | - |
| Radicchio | Mar 18 | Apr 8 (Transplant out) | Aug 16 |
| Endive | Mar 18 | Apr 8 (Transplant out) | Jul 27 |
| Watercress | Apr 1 | Apr 8 (Transplant out) | Aug 26 |
| Sorrel | Mar 11 | Apr 1 (Transplant out) | Aug 26 |
| Sunchokes | Apr 22 | Apr 8 (Transplant out) | - |
| Malabar Spinach | Mar 11 | May 6 (Transplant out) | - |
| Amaranth Greens | Apr 1 | May 6 (Transplant out) | Sep 10 |
| Luffa Gourd | Mar 11 | May 6 (Transplant out) | - |
| New Zealand Spinach | Mar 25 | May 6 (Transplant out) | - |
| Fava Beans | Apr 22 | Mar 25 (Transplant out) | Aug 1 |
| Chayote | Mar 25 | May 6 (Transplant out) | - |
| Corn Salad | Apr 22 | Mar 25 (Transplant out) | Aug 26 |
| Bitter Melon | Mar 25 | May 6 (Transplant out) | - |
| Cardoon | Mar 11 | Apr 22 (Transplant out) | - |
Herbs
| Crop | Start seeds indoors | Plant outside | Fall planting by |
|---|---|---|---|
| Basil | Mar 11 | Apr 29 (Transplant out) | - |
| Cilantro | - | Apr 8 (Direct sow) | Sep 5 |
| Parsley | Feb 25 | May 6 (Transplant out) | Aug 11 |
| Dill | - | Apr 29 (Direct sow) | Aug 26 |
| Lemon Balm | Mar 11 | Apr 22 (Transplant out) | - |
| Borage | Apr 22 | Apr 22 (Transplant out) | Aug 31 |
| Chervil | Apr 22 | Apr 1 (Transplant out) | Aug 31 |
| Lemongrass | Feb 25 | May 6 (Transplant out) | - |
| Summer Savory | Mar 11 | Apr 22 (Transplant out) | - |
| Marjoram | Mar 11 | Apr 29 (Transplant out) | - |
| Lovage | Mar 11 | Apr 22 (Transplant out) | Jul 27 |
| Anise Hyssop | Feb 25 | Apr 22 (Transplant out) | - |
| Shiso | Mar 11 | Apr 29 (Transplant out) | - |
| Stevia | Feb 25 | May 6 (Transplant out) | - |
| Chamomile | Mar 11 | Apr 8 (Transplant out) | Aug 21 |
| Tarragon | Apr 22 | Apr 22 (Transplant out) | - |
How to read this calendar
Start seeds indoors is when to sow in trays inside so seedlings are ready to transplant. Plant outside is when to transplant seedlings or direct-sow seed, based on frost tolerance. Fall planting by is the latest date to start a fall crop and still harvest before the first fall frost. Tender crops wait until after the last spring frost; hardy crops can go out earlier.
Computed from NOAA 1991–2020 Climate Normals at Mt Laguna #3, Ca, 9.6 miles away. Averages for planning, not a forecast. Page updated Aug 4, 2026.