🌿 Begonia

Use a loose, humus-rich, non-draining substrate that retains some moisture but never gets soggy. A good general mix for containers is a peat- or coco-based compost amended with perlite/potato and/or fine orchid bark for aeration; rhizomatous/epiphytic types benefit from a coarser bark-based mix. Maintain regular humidity during active growth, allowing the top layer to start drying out between waterings; reduce humidity during cool, low-light periods and avoid soil saturation to prevent root and stem rot. Choose pots with drainage holes and avoid compact media; repot in spring or when roots are established in a fresh mix.

Begonia seeds are extremely fine and are best started indoors in seed trays or plug trays. - Timing: Sow from late winter to early spring (about 10-12 weeks before the last frost expected for summer bedding plant types). - Sowing method: Fill trays with fine, sterile potting soil. Pre-wet the surface. Sprinkle seeds finely; do not cover (surface sowing), as light encourages germination. Gently press down and mist to set seeds. - Humidity/light: Cover with a transparent lid or place in a propagator to maintain high humidity, but aerate regularly to reduce seedling damping-off. Provide bright light, but avoid direct sunlight. - Temperature: Maintain a constant temperature, around 20-24°C. - Watering: Maintain regular humidity by misting or sprinkling; avoid waterlogging and seed dislodging. - Germination: Often slow and uneven; maintain constant heat, humidity and light. - Aftercare: Once seedlings are large enough to handle, transplant carefully into small pots or modules and grow in good light and slightly cooler temperatures. - Planting: Harden off gradually and transplant outdoors only when there is no risk of frost. Space plants according to the type of plant you are growing (bedding plants or plants in larger containers).

Feed begonias only while they are actively growing. In spring and summer, apply a balanced water-soluble fertilizer (e.g. 10-10-10 or 20-20-20) at half the rate every 2-4 weeks, or use a light dose of slow-release fertilizer according to the label. Reduce frequency in late summer and stop or sharply reduce feeding in autumn-winter when growth slows or plants are resting. Avoid high-nitrogen formulas, which promote soft, leafy growth and may reduce flowering. Always water first and never fertilize on dry soil; wash potting mix periodically with plain water to prevent salt build-up.

Outdoors, apply a light mulch (approx. 2-5 cm) of fine bark, compost or leaf mold to conserve moisture and moderate soil temperature. Keep the mulch away from the crown/stems and avoid heavy, damp mulches to reduce the risk of stem/crown rot. In containers, use only a thin layer of potting soil if you wish, and ensure that it does not impede drainage or aeration or keep the potting mix too moist.

Pinch off soft shoot tips during active growth to encourage branching and a compact habit. Regularly remove wilted flowers (and developing seed pods) and yellowed, dead or damaged leaves; trim healthy tissue cleanly to avoid disease. For cane and angel-wing species, shorten light stems by cutting just above a leaf node to encourage the appearance of new side shoots; older stems can be cut back more firmly in spring to rejuvenate them. For rhizomatous and fibrous begonias, lightly cut back shoots that stretch and remove overloaded shoots to improve air circulation. For tuberous begonias, remove spent flowers throughout the season; after flowering, let the foliage die back naturally, then cut back the stems once they have yellowed and dried out before storing the tubers - avoid severe pruning when the plants are still growing. Use sharp, clean tools and avoid leaving stumps.