Bulbs in layers - Just right for pots  For the more creative bulb lovers, there is the ‘sandwich-system’: a method of planting various species in layers on top of each other. When choosing species which will flower a few weeks after each other, this results in a pot that continues to flower for almost two months. Of course, this system has its own specific rules as well.
The basis is the same: a pot (tub, barrel, etc.), measuring at least 25 cm wide and tall, in which you place the same layer of shards for drainage. On top put the potting compost and the first layer of bulbs. Bulbs flowering last in the season always at the bottom, the earlier flowering ones on top. The first bulb layer is covered with as much potting soil as necessary to make the bulbs invisible. The second layer of earlier flowering bulbs is placed on top of this. When the pot is big enough, at least 30 cm wide and tall, it is possible to add a third layer. Really big pots can hold even a fourth layer. Keep in mind that the last layer should be covered with sufficient soil, as much as if planted in the garden. Remember that bulbs in pots are extra vulnerable and need extra protection. Choices and care In choosing bulbs for layered pots you should be aware that bulbs which grow a lot of foliage, are less suitable as their companions might not get enough light. In addition, one should choose strong species, which can stand a bit of wind, especially for pots destined for balconies and roof patios. After flowering, bulbs in pots should be cared for with water, light and small quantities of fertiliser, till their leaves have died off completely. After that their resting period starts, till the next season. Pots, in which bulbs and perennials are combined, can really grow into small gardens. Useful are low-growing perennials which do not compete with the growth of the bulbs and which should feel at home in pots. These species should also show their best early in the year by being evergreen, show early leaves or even early blossom. Following is a selection of three of these magical gardens. Ajuga reptans ‘Catlin’s Giant’ and Hyacinthus orientalis (large red leaves and soft blue flowers. Campanula portenschlagiana and Iris reticulata ‘Cantab’ (fresh green leaves with soft blue flowers). Euphorbia amygdaloides ‘Purpurea’ and narcissi ‘February Gold’ (red-brown leaves with yellow flowers). Jacqueline van der Kloet - mastergardener | 