Sow Signal
2026 Casa Blanca, AZ Planting Calendar
Spring / Last Frost-based Planting
| Crop | # Weeks to Start Before Last Frost |
Start Inside (mm-dd) |
Direct Sow (mm-dd) |
Transplant (mm-dd) |
Notes |
|---|---|---|---|---|---|
| Acorn Squash | 03-14 | Sow after last frost in warm soil; give vines room to sprawl. | |||
| Arugula | 9 | 12-20 | 02-14 | Start indoors early with bright light; transplant to cool-season beds. Arugula is a cool-season green; direct sow about 1 week before last frost in workable soil. | |
| Asparagus | Plant asparagus crowns in a permanent trench as soon as soil can be worked. | ||||
| Banana Peppers | 9 | 12-20 | 03-14 | Start banana peppers 8–10 weeks before last frost for best yields. Transplant after frost when soil and nights are warm. Peppers stall in cool soil. | |
| Basil | 7 | 01-03 | 03-07 | Start Basil Seeds indoors Transplant after frost risk has passed. Basil blackens in cold conditions. | |
| Bay Laurel | 03-21 | Set out later once nights are reliably warm; bay laurel is cold-sensitive. | |||
| Bell Peppers | 9 | 12-20 | 03-14 | Peppers take a long time to germinate; start early in a warm spot. Transplant once nights are consistently above 55°F. Peppers stall in cool soil and recover slowly. | |
| Blackberries | 01-24 | Plant dormant blackberry canes in early spring; provide trellis/support as needed. | |||
| Blueberries | 01-24 | Plant dormant blueberry bushes in early spring while soil is workable; mulch and water in. | |||
| Bok Choy | 6 | 01-10 | 02-07 | Start bok choy indoors 4–6 weeks before last frost for spring planting. Direct sow bok choy at the beginning of spring once soil can be worked. | |
| Borage | 02-07 | Borage tolerates cool weather; sow before last frost for early flowers and pollinator support. | |||
| Broccoli | 7 | 01-03 | 02-21 | Start indoors to ensure plants are established before the heat hits. Broccoli can handle a light frost after being hardened off. |