Potted Begonia Culture

For potted begonias, it is critical to maintain substrate acidity within the pH 5.5–6.5 range, as iron deficiency occurs when levels rise above 6.0. The root system of these plants is extremely sensitive to an excess of ammoniacal nitrogen, and optimal development is ensured by maintaining an N:K₂O ratio of 1:1.5.

Cultivation technology requires a specific light regime with supplemental lighting for up to 24 hours at the seedling stage to ensure compactness. Irrigation is performed strictly at the root zone, as water contact with foliage triggers spotting, while substrate waterlogging leads to rapid decay of the root system and tubers.

Tuberous begonia forms require mandatory cyclical dormancy management, which includes a gradual reduction in irrigation in autumn and its complete cessation after foliage drop. When propagating by seed, a crucial step is the disruption of the pellet coating, without which germination is impossible.