When to plant
Plant Gloxinia tubers in spring when temperatures begin to warm. Indoors, you can start them earlier as long as the environment is bright and warm. Avoid planting during cold or low-light months.
Where to plant
Grow Gloxinia indoors or in a heated greenhouse. Choose a bright spot with indirect light — direct sun can scorch leaves. Ideal locations include east-facing windowsills or bright living spaces. Outdoor planting is not recommended in temperate climates.
Preparing the soil
Use a light, porous potting mix such as a blend for African violets. Ensure excellent drainage by adding perlite or fine bark. Gloxinia dislikes heavy or compacted soil and grows best in evenly moist, airy growing media.
Preparing the tubers
Inspect the tubers and identify the top: it has a shallow concave depression where new shoots emerge. If tubers appear dry, lightly mist them — do not soak, as they rot easily. Allow tubers to warm to room temperature before planting.
Planting the tubers
Plant tubers shallowly with the top just at, or slightly above, the soil surface. Do not bury deeply. Space tubers 12–15 cm apart in larger containers, or plant one tuber per small pot. Water lightly after planting.
After planting
Keep soil barely moist until growth appears. Maintain warm temperatures (18–24°C) and avoid cold drafts. Once leaves develop, increase watering slightly but keep water away from the crown to prevent rot.
During growth
Water regularly to keep the soil evenly moist but never waterlogged. Feed with a balanced, diluted liquid fertilizer every 2–3 weeks. Remove spent flowers to prolong blooming. Provide good air circulation but avoid direct airflow on the plant.
After flowering
Allow the plant to rest. Reduce watering gradually as the leaves yellow and die back. Let the tuber dry and store the pot in a cool, dark place for 2–3 months before restarting the cycle in late winter or early spring.
Extra tips
Always water Gloxinia from below to avoid crown rot. Rotate plants regularly for even growth. Use shallow pots, as their roots stay near the surface. For best results, restart old tubers each year with fresh compost and good light levels.
