Phlox drummondii - Annual Phlox

PHLOX DRUMMONDII (Annual Phlox)

Seed Treatment (Optional for Better Germination)

  • Scarification: Lightly rub the seeds with fine sandpaper or soak them in warm water for 2–4 hours to soften the seed coat. 

Sowing Instructions

Direct Sowing (Best Method)

  1. Timing:

    • Sow seeds after the last frost when soil temperatures reach 60–70°F (15–21°C).

    • In warm climates, Phlox can be fall-sown for early spring blooms.

  2. Site Selection:

    • Choose a location with full sun to partial shade.

    • Soil should be well-draining and moderately fertile.

  3. Planting Depth & Spacing:

    • Sow seeds ⅛ inch (3 mm) deep.

    • Space seeds 6–12 inches (15–30 cm) apart to allow proper airflow.

  4. Watering:

    • Keep the soil moist but not waterlogged during germination.

    • Avoid overhead watering to prevent fungal diseases.

  5. Germination Time:

    • Seeds typically germinate in 7–14 days under optimal conditions.

Transplanting (For Indoor Sowing)

  • Start Indoors:

    • Sow seeds 6–8 weeks before the last frost in seed trays.

    • Provide warmth (65–75°F or 18–24°C) and bright indirect light.

  • Harden Off:

    • Before transplanting, gradually acclimate seedlings to outdoor conditions over a week.

  • Transplant Outdoors:

    • Move seedlings when they are 2–3 inches tall with 2–3 sets of true leaves. 

Additional Care Tips

  • Fertilization: Use a balanced fertilizer every 3–4 weeks to encourage blooming.

  • Mulching: Apply a thin layer of mulch to retain moisture and suppress weeds.

  • Deadheading: Regularly remove spent flowers to promote continuous blooming.

Phlox drummondii will reward you with lush, colorful blooms all season long! ? 

 

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