Pelargonium — Growing reference
| Scientific name | Pelargonium x hortorum |
|---|---|
| Seed germination (days) | 7–21 |
| Soil temperature for germination (°C) | 18.3–23.9 |
| First harvest or flowering (days) | 60–90 |
| Measured from | Transplant |
| Plant spacing (cm) | 30.5–45.7 |
| Mature height (cm) | 30.5–61 |
| Mature spread (cm) | 30.5–45.7 |
| USDA hardiness zones | 9–11 |
| Light | Partial sun |
| Water | Moderate |
| Sowing method | Cutting |
Growing directions
Plant in well-drained, moderately fertile soil in full sun to partial shade; despite being called 'geraniums,' these plants are Pelargonium — South African natives in the family Geraniaceae. They are among the most popular and widely grown bedding plants in the world, producing heads of bright red, pink, salmon, white, or bicolor flowers on compact mounds of velvety, horseshoe-zoned foliage. In zone 9a, where summers are too hot for them to thrive, they are grown as cool-season annuals from fall through spring — planted in October and blooming through March or April before summer heat causes decline. Take cuttings in late summer before heat ends the season, root them indoors or in shade, and use them as next fall's transplants. Excellent for containers, window boxes, and cool-season borders.
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