How to Grow Phlox Drummondii from Seeds

Phlox drummondii, commonly known as Drummond's phlox or annual phlox, is a lovely flowering plant that produces clusters of vibrant, fragrant flowers. To grow Phlox drummondii from seeds, follow these steps:

1. Seed Preparation:

   • Obtain fresh Phlox drummondii seeds from a reputable supplier or save them from a previous season's harvest.
   • No special seed treatment is required for Phlox drummondii seeds.

2. Timing:

   • In regions with mild climates, sow Phlox drummondii seeds directly in the garden bed in early spring after the last frost date.
   • If you live in a colder climate, start the seeds indoors 6-8 weeks before the last frost date and transplant the seedlings outdoors once the danger of frost has passed.

3. Soil Preparation:

   • Choose a well-draining soil mix for growing Phlox drummondii. Incorporate compost or organic matter to improve soil fertility and drainage.
   • Phlox drummondii prefers a slightly acidic to neutral soil with a pH range of 6.0 to 7.0.

4. Sowing Seeds Indoors:

   • Fill seed trays or individual pots with the prepared soil mix.
   • Moisten the soil lightly before sowing the seeds.
   • Place 2-3 seeds in each pot or tray, pressing them gently into the soil but not burying them too deeply.
   • Cover the containers with a plastic dome or plastic wrap to create a mini greenhouse effect.
   • Place the trays or pots in a warm location with indirect sunlight or under grow lights.

5. Sowing Seeds Outdoors:

   • Prepare the garden bed by removing weeds and loosening the soil.
   • Sow the Phlox drummondii seeds directly into the prepared soil, scattering them evenly and lightly pressing them into the soil surface.
   • Lightly water the area to settle the seeds.

6. Germination and Care:

   • Phlox drummondii seeds typically germinate within 7-14 days, depending on the conditions.
   • Keep the soil consistently moist during the germination period and beyond. Avoid overwatering, as excessive moisture can cause seed rot.
   • Once the seedlings emerge, thin them out, leaving the healthiest plants spaced 6-12 inches apart.

7. Sunlight and Watering:

   • Phlox drummondii thrives in full sun to partial shade. Provide at least 4-6 hours of direct sunlight daily for optimal growth and flowering.
   • Water the plants regularly, aiming for even moisture. Avoid allowing the soil to dry out completely, but also prevent waterlogging.

8. Maintenance:

   • Mulch around the plants to conserve moisture, regulate soil temperature, and suppress weed growth.
   • Pinch back the tips of the plants when they reach about 6 inches in height to promote bushier growth and more flowers.
   • Deadhead faded flowers regularly to encourage continuous blooming and prevent seed formation.

9. Pests and Diseases:

   • Monitor the plants for common pests such as aphids or caterpillars. Treat infestations using organic pest control methods if necessary.
   • Phlox drummondii is generally resistant to diseases. However, provide good air circulation and avoid overcrowding to minimize the risk of fungal diseases.

10. Harvesting Seeds:

    • If you'd like to collect seeds for future planting, allow some flowers to mature and dry on the plants.
    • Harvest the seeds by gently shaking the dry seed heads into a container. Store them in a cool, dry place until the next sowing season.

By following these steps, you can enjoy the vibrant and fragrant blooms of Phlox drummondii in your garden. With proper care and attention to watering, sunlight, and maintenance, your Phlox drummondii plants will reward you with a stunning display of color throughout the blooming season.