Quick answer: Black Dragon Coleus sprouts in 7–14 days. Surface-sow on very moist mix, seal it under a dome, and keep it in bright, indirect light at 70–90°F at all times.

Learning how to grow from seed? Head over to our planting guide!

Black Dragon Coleus Seeds - Plantflix

details

Difficulty Beginner
Germination 7–14 days
Temperature 70–90°F
Depth Surface sow
Seed prep (none needed!)
Method Greenhouse
Time to maturity About 6 months
Light Bright Indirect / Part Sun / Grow Lights
Pet-friendly No
black dragon coleus seeds

instructions

  1. Wet the mix. Fill a soil pod or small pot with very moist seed mix.
  2. Surface-sow. Press 2–3 seeds onto the surface. Don't cover them; they need light.
  3. Dome on. Seal under a humidity dome at 70–90°F in bright indirect light.
  4. Mist, don't pour. Keep the surface moist; sprouts appear in 7–14 days.
  5. Pinch. Once seedlings have 3–4 sets of leaves, pinch the tips for a bushier plant.
Black Dragon Coleus Seeds - Plantflix

things to know

  • Color needs light: the deepest purple comes with bright, indirect light.
  • Cold sensitive: keep above 70°F; it sulks below 60°F.
  • Pick a planter that holds moisture: plastic, rice hull or ceramic, with a dome. Skip terra cotta, peat pots, coco coir pots and egg cartons. They wick water away from the seed.
  • New to seeds? Start with our seed prep guide and planting guide.
grow your own!

plant care tips

  • Light: bright indirect light or a grow light.
  • Water: keep evenly moist; it wilts quickly when dry but bounces back.
  • Feeding: every 2 weeks in the growing season.
  • Flowers: pinch off flower spikes to keep the leaves full.
try them out!

faqs

Why are my coleus seeds not sprouting?

They need light and warmth. Make sure they're on the surface and above 70°F.

Why is my plant green instead of dark purple?

Usually too little light. Move it somewhere brighter.

Is coleus pet-safe?

No. It's mildly toxic to cats and dogs.

these are key aspects of your setup

check your setup!

  • 💡light: is your setup away from direct sun? these seeds should stay in indirect or filtered light, or better yet, under grow lights.
  • 💧moisture: does the soil feel very moist to the touch?
  • 🌡️temperature: is the setup away from direct sun, open windows, or heat vents? make sure it stays consistently between 70F-90F (use a heat mat if the temperature falls under 70F)
  • ☁️humidity: do you see condensation on the humidity dome? if not, make sure the dome is fully sealed, the setup is warm enough, and there's enough moisture in the soil.
  • 💚care: leave the dome on and only open it once a week to add water.
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