Lisianthus Cessna Green coated seeds - Eustoma russelianu

How to sow the coated seeds of Lisianthus F1 Cessna Green III: 
Under a bright and heated shelter: January to March for summer flowering (allow 12–15 weeks before planting out). Sowing is possible from December for well-equipped amateurs. Professionals under a heated greenhouse: in October-November to advance the season.
In very mild climates, a sowing in August-September can be attempted under protection for an early planting in spring.

Sow on the surface, without covering them, in a fine, sterile potting compost (pH 6.3–6.8) kept uniformly moist, but never waterlogged; they need light to germinate. Ideal temperatures: 20–22°C until emergence (10–20 days), under a lid or film to retain humidity, then 18–20°C with good ventilation and 14–16 hours of light.

Water by capillary action, provide a gentle feed (complete fertiliser at low strength) and transplant into plug plants when the seedlings have 2–3 true leaves, handling the root ball without breaking the roots. Harden them off for 10 to 14 days (gradually more light and air) before planting out after all risk of frost.
In open ground, choose a plot in full sun where the soil is well-draining and fertile, deeply loosened; plant at 15–20 cm spacing, mulch to retain moisture, install a support net if the site is exposed to wind, and water regularly at first, then more spaced out once the roots have established. Maintain steady growth with small applications of potassium-rich fertiliser (avoid excesses of ammoniacal nitrogen), monitor ventilation to limit Botrytis and damping off, and intervene quickly against aphids and thrips.
In pots, use a container of at least 25–30 cm, with drainage holes, filled with an airy substrate (quality potting compost + 20–30% perlite or pozzolana); water when the top 2 cm are dry, allow to drain, and feed every 2–3 weeks at a light dose or with a slow-release fertiliser. Pinching is not essential for cutting (it delays flowering), but can be attempted very early (4–6 pairs of leaves) on potted subjects to encourage some decorative branching.

Growing temperatures after planting: 16–18°C at night and 18–24°C during the day; avoid heat stress and water on the flowers.
For harvesting, cut when the first flower is open, or the buds are well coloured; remove lower leaves, recut the stems and place them quickly in clean water: vase life is excellent if the plant has grown without water stress.