How do you grow Gloxinias from tubers?
Posted by Dobies Staff on 07 November 2014 11:42 am

Gloxinia Tubers should be started into growth in February or March by placing them singly in 9cm (3½") pots in a moist, well-drained potting compost. The pots should be nearly filled with compost, into which the tubers are pressed and just covered. Water the compost and then no water should be given until growth begins unless the compost dries out completely. Grow on the plants in bright light but not in direct sun at a temperature of 18oC (65ºF). Water sparingly until the plants are well rooted. Overwatering can lead to lush foliar growth at the expense of flowers. The plants should be potted on into 12.5cm (5") pots before becoming pot bound.

When in full growth, give the plants plenty of water and in hot conditions mist them lightly with tepid water. Too much water laying on the leaves can damage them. Liquid feeds should be given fortnightly from the time the flowers appear, taking care to avoid wetting the foliage. A lower temperature during the flowering period will help to prolong the display.

As the plants cease flowering and the foliage starts to wither, water should be withheld gradually until the leaves die away. The tubers should then be kept dry and stored in a warm, dry place at a temperature of 10oC (50ºF) until starting them into growth the following season.

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