Plant tubers 5-7.5cm (2-3in) deep in reasonably fertile well-drained soil and in a sunny, sheltered position.evansiana AGM, which is hardy down to 0☌ (32☏). The most hardy to try is Begonia grandis subsp. Hardy tuberous begonia can be an exotic addition to shady borders particularly in late summer. The tubers of Begonia ‘Million Kisses’ may be small at the end of the first season but may then over-winter, however most gardeners replace their plants each year.The dry tubers should be stored in barely moist soil or sand in a frost-free shed, ideally at 7☌ (45☏), and watered occasionally to prevent shrivelling The leaves will begin to yellow naturally at which time watering should be reduced. Tuberous begonias need to be lifted before the first frosts.Water regularly during dry periods but avoid wetting the foliage.tomato fertiliser) from four-six weeks after their final re-potting until September Feed every week with high potassium feed (e.g.Plants can be hardened off and planted outside after the danger of frost has passed.When the leaves are showing, pot into individual 10-12.5cm (4-5in) pots of John Innes No 2 compost or multipurpose compost, including peat-free ones.

Place tubers on the surface of the compost, hollow side uppermost, 2cm (¾in) apart and 2.5cm (1in) deep.Seed or potting composts are used for growing seedlings or plants in containers - a wide range of commercially produced peat-free composts are available, made from a mix of various ingredients, such as loam, composted bark, coir and sand, although you can mix your own. It is added to soil to improve its fertility, structure and water-holding capacity. Garden compost is a soil improver made from decomposed plant waste, usually in a compost bin or heap.Malvern Autumn Show - 27-29 September 2024Ĭan refer to either home-made garden compost or seed/potting compost:.RHS Flower Show Tatton Park - 17-21 July 2024.RHS Hampton Court Palace Garden Festival - 2–7 July 2024.RHS Botanical Art and Photography Show - 14 June – 7 July 2024.

Wax begonia diseases