Things You'll Need:
- Small planters
- Gardening soil
- Balanced fertilizer
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Step 1
Sow lobelia seeds in a small planter filled with garden soil about 10 to 12 weeks before the final frost of spring. Do not cover the seeds with soil; light helps them germinate and sprout. Keep the soil moist by bottom watering.
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Step 2
Choose a location to plant the lobelia that receives about six hours of sunlight each day, preferably with some afternoon shade. Wait until the final frost of the year. Dig a hole large enough to hold the roots of the plant without bending.
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Step 3
Place the lobelia plant directly into the hole and refill with soil. Water the plant immediately to collapse any air pockets and compact the soil. Plant other lobelia plants a minimum of six inches away.
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Step 4
Water two to three times per week, or often enough to keep the soil moist at all times. Apply about one inch of water to ensure the soil is moistened thoroughly. Reduce watering during the winter to once per week to reduce the chance of freezing damage.
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Step 5
Feed lobelia once per year using a balanced 10-10-10 NPK fertilizer. Follow the manufacturer's directions for proper application. Apply in early spring to encourage the growth of flowers throughout the growing season.
