Begonias

Begonias can be grown in a sheltered shadehouse, on a veranda, in a sun room, or on a window ledge. They are not glasshouse plants (although they are grown this way at Ballarat) as glasshouses become too hot in summer. In Ballarat summer cooling is needed in the begonia glasshouses.

Tuberous begonias grow best in partial shade or filtered sunlight. Exposure to excessive sunlight can result in burnt flowers and leaves. Too much shade results in foliage that is very lush with few flowers.

Growers recommend shade when the sun exceeds 50,000 lux. As full summer sun in Australia is 110,000 lux this means 50% shadecloth would be required in most areas. Normal interior light levels measure around 500 lux.