Borage
warm-season crop
At a glance
| Suitable zone groups | All four zone groups (3-4, 5-6, 7-8, 9-10), as a warm-season annual |
|---|---|
| Planting window | See the guide text below, in general terms relative to your last spring frost |
| Sun | Full sun |
| Soil | Well-draining soil, tolerates poor soil |
| Watering | Moderate watering |
About this plant
Borage grows well across all four zone groups (3-4, 5-6, 7-8, and 9-10) when cultivated as a warm-season annual. It thrives in full sun and adapts well to well-draining soil, even tolerating poor soil conditions.
Provide moderate watering to keep plants healthy, though they tolerate brief dry spells once established. Direct sow seeds outdoors after all danger of frost has passed in spring to encourage continuous blooms.
Common beginner failures and fixes
- Flopping stems: Stake tall plants or grow them in dense patches for support.
- Root rot: Plant in well-draining soil and avoid overwatering.
- Overcrowded seedlings: Thin plants early to allow adequate airflow and spread.
- Poor germination: Sow seeds outdoors only after all danger of frost has passed.
Beginner checklist
- Choose a site with full sun exposure.
- Prepare well-draining soil, amending if necessary.
- Direct sow seeds after all danger of frost has passed.
- Water moderately to keep soil moist while establishing.
- Thin seedlings to provide adequate spacing.
Zone groups and planting windows here are general guidance. Confirm your own zone and last frost date locally before planting.