How and When to Plant Summer Bulbs

Posted by Shannen Godwin on 17th Jun 2021

How and When to Plant Summer Bulbs

As spring approaches, it’s time to head outdoors and prepare your garden for summer blooms. Flowers categorised as ‘summer bulbs’ are flowering bulbs which grow and bloom during the summer, and so they are planted at the start of spring. Summer bulbs need warm weather and warm soil; a rule of thumb to remember is if it’s time for your tomatoes to go outdoors, it is also time to plant your summer bulbs.

Begonias

How to plant: Begonias planted in beds which are enriched with well-rotted or leaf mould will make a fine show. They should be started in shallow boxes in light soil; the saucer like tubers should be planted very shallow with the hollow side up. As soon as any danger of frost is passed then they can be transferred to their position in the garden at least 30cm apart.

Dahlias

How to plant: Dahlia tubers can be planted 10cm deep in fertile well drained soil, outdoors in spring when the frost has disappeared. They prefer to be in a sunny location and spaced at approximately 45cm apart. In areas where there is extreme cold, dig up dahlias and store in a cool peat over the winter. Apply a high potash fertiliser every few weeks in summer and dead head when necessary.

Lilies

How to plant: Each lily bulb should be surrounded with a little sharp sand both under and above the bulb to keep slugs away and to ward off excessive wetness. As most liliums are stem rooting we strongly recommend you plant at 15cm deep. They give a much better display when planted in clumps of 3, 6 or 12 bulbs (45cm apart). Planting time is October through to April.

Gladioli

How to plant: plant gladioli corms about 10-15cm deep and about 10-15cm apart, in fertile/well drained soil. When planting in a heavy soil, place some sand underneath each corm to help with drainage. At Parkers we recommend planting Gladioli in groups at monthly intervals, starting early spring, to extend the flowering season for a display which lasts all summer long.