Kniphofia uvaria (Red Hot Poker)

For optimal germination rates, initiate seed propagation indoors under controlled conditions—unless the species exhibits a high sensitivity to root disturbance. This approach allows precise regulation of temperature, humidity, and light, improving germination consistency and seedling viability. Do not skip any recommended seed treatments, as they are essential for uniform and successful germination.

Seed Treatment

  1. Cold Stratification

    • Place seeds in a moist paper towel inside a sealed plastic bag.

    • Store in the refrigerator (40°F/4°C) for 4–6 weeks.

    • Check occasionally to ensure the paper towel remains moist.
      ? If seedlings sprout in the fridge, remove them gently and plant immediately.

  2. Pre-Soaking

    • Soak seeds in warm water for 12–24 hours before sowing.

Sowing Instructions

Indoor Sowing (Best for Controlled Growth)

  1. Timing: Start seeds 8–10 weeks before the last frost indoors.

  2. Seed Trays: Fill with a well-draining, sandy potting mix (mix of sand, peat, and perlite).

  3. Planting Depth: Sow seeds just below the surface (lightly press into the soil but do not bury deeply).

  4. Moisture & Temperature: Keep soil moist but not soggy. Maintain temperatures of 65–70°F (18–21°C).

  5. Light: Use grow lights to maintain 12–16 hours of light per day.

  6. Humidity: Use a humidity dome or clear cover to maintain consistent moisture during germination. Open the dome BRIEFLY once per day to allow fresh air in and reduce mold risk. Remove the dome entirely once seedlings emerge.

  7. Germination Time: Seeds take 21–45 days AFTER stratification.

Outdoor Sowing (For Natural Growth)

  1. Timing: Sow in fall or early spring for natural stratification.

  2. Location: Choose a site with full sun and well-draining soil.

  3. Planting Depth: Sow seeds shallowly (⅛ inch or 3 mm deep).

  4. Watering: Keep soil evenly moist until germination occurs.

Transplanting & Care

  • Hardening Off: Once seedlings have 2–3 sets of true leaves, gradually introduce them to outdoor conditions over 7–10 days.

  • Spacing: Transplant seedlings 12–18 inches (30–45 cm) apart.

  • Soil: Prefers loamy, well-draining soil; avoid waterlogged areas.

  • Watering: Drought-tolerant but needs regular watering until established.

Fertilization: Apply a balanced fertilizer in early spring.

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