Planting Lobelia Seeds - Blue Carpet
When to Plant Lobelia Seeds
Start Lobelia indoors about 10-12 weeks before the final killing frost in spring. Although Lobelia can be started outdoors, the germination rate is typically much lower, making indoor starting highly recommended.
Where to Plant Lobelia Seeds
Choose a location with partial shade for Lobelia, although it can tolerate full sun. In full sun, ensure ample watering. Lobelia thrives in rich, well-draining soil.
How to Plant Lobelia Seeds
Lobelia seeds need light to germinate, so take care not to cover them when planting.
It's optimal to start Lobelia in trays with cells indoors. Sow the seeds thinly, press them onto the soil surface, but avoid covering them as Lobelia seeds need sunlight for germination. Keep the soil consistently moist at a temperature of 65-75°F. Germination typically takes about 14-21 days. Harden off seedlings before transplanting. Once the threat of frost has passed, transplant Lobelia outdoors with an ideal spacing of 4-6 inches.
How to Care for Lobelia
Once established, Lobelia plants need minimal care, although older plants may experience dieback in high heat. If plants show signs of decline, trim them down by up to a third and ensure they receive afternoon shade. Consistent watering and feeding can help your Lobelia rebound.