French Marigold — Growing reference
| Scientific name | Tagetes patula |
|---|---|
| Seed germination (days) | 5–7 |
| Soil temperature for germination (°C) | 21.1–23.9 |
| First harvest or flowering (days) | 45–65 |
| Measured from | Transplant |
| Plant spacing (cm) | 22.9–30.5 |
| Mature height (cm) | 15.2–45.7 |
| Mature spread (cm) | 15.2–30.5 |
| USDA hardiness zones | 2–11 |
| Light | Full sun |
| Water | Moderate |
| Sowing method | Transplant |
Growing directions
Start indoors 6–8 weeks before last frost or direct sow after all danger of frost has passed in well-drained, moderately fertile soil in full sun; marigolds transplant easily and bloom within 6–8 weeks of transplanting. Tagetes patula is the compact, bushy French marigold with small, double or single flowers in yellow, orange, red, and bicolors that bloom continuously from planting through frost; it has a long history as a companion plant for vegetable gardens, and research has confirmed that high-density plantings suppress root-knot nematodes (Meloidogyne species) in subsequent seasons. The pungent fragrance of the foliage deters some insect pests; the flowers provide nectar for small native bees, hoverflies, and butterflies; and the plant is heat-tolerant, drought-resistant, and virtually care-free. Deadheading is not required but extends the display.
Source and local conditions
Typical planning ranges from OpenPlantDB (CC0). Cultivar, climate, season and growing method can change these values. Confirm the seed label and local guidance before planting.
Source & verification
OpenPlantDB · CC0