Catalpa SPECIOSA

Sowing and germination

To increase germination, seeds need cold, moist stratification for 1-2 months at a temperature of 2-5°C. After stratification, the seeds are kept for 1-2 hours in a 1% solution of potassium permanganate, then soaked for 12-24 hours in warm water with the addition of a growth stimulator: balanced plant vitamin supplement, natural plant growth stimulant, amino-acid plant fertilizer, anti-stress adaptogen solution or root development stimulant. Then they are sown in a light, loose substrate with the addition of sand to a depth of about 1 cm, moistened with a spray bottle, covered with film or placed in a greenhouse and germinated in the light at a temperature of 20-24°C.