During the month of March the northern hemisphere spring equinox occurs, thus the length of daylight is
equal to that of darkness. From then onwards the daylight hours increase and the gardening season is well
and truly upon us and no doubt a floriferous spring and summer to look forward to.
A variety of summer bloom can come from the bulbous plants and the month of March is ideal to plant
the following popular bulbs:
- Cannas Lily
All of the above can be regarded as sub-tropical plants, which thrive in the sunny and warm locations of
the garden. Therefore, it is best to take heed of the weather forecast and not to proceed with planting if a
frost is imminent.
Essentially the difference between spring bulbs and summer bulbs is that the spring bulbs require several
weeks of cold temperatures to trigger the upward growth, hence they are planted in autumn and remain in
the soil throughout the winter with growth and blossom occurring in spring. However, the summer bulbs
with their preference for a warmer climate do not require this slumber period of cold temperatures.
The term bulb is used generically as it includes bulbs, tubers, corms and rhizomes. They are all
underground storage organs, the correct name which classifies them all under one umbrella is
‘Geophytes’ originating from Greek, earth (Geo) and plant (phytes).
The planting depths can vary depending on the type of bulb, a good rule of thumb is two to three times the
size of the bulb which more than often equates to planting approximately 100mm deep.
Dahlias are root tubers and can benefit from being pot planted in a greenhouse for the initial growth to
commence and then transplanted into the garden, this is to ensure they do not succumb to any frosts. It is
however, the temperature of the soil, a minimum of 13c and not the air temperature which contributes to
healthy and beautiful dahlias, therefore, it is best to choose an area with full sun and lighter, free drainage
Gladioli and Crocosmias are both corms and to be planted approximately 100mm deep and it is advisable
to prepare the planting bed by adding some compost after loosening the soil with a garden fork. The
Crocosmia corms will benefit from being planted in clumps, whereas, the Gladioli should be planted
individually with the point of the corm facing upwards and by placing several in close vicinity to one
another, one will be rewarded with a fabulous display of blossom. Gladioli also make excellent cut
flowers for the enthusiastic florists amongst us.
Begonia tubers are suited for containers and hanging baskets and will provide a continuous colour
throughout the summer and autumn. The fibrous rooted variety are more suitable for the garden beds. The
tubers have a convex side which is planted downwards, the concave side will posses the new growth and
faces upwards. Plant in a pot with a thin layer of gravel/shingle to allow for drainage then the remainder
with compost and plant the tuber just beneath the surface.
The range of colourful begonias available ensure hanging baskets are a great addition to any garden.
The canna lily is a rhizome (underground stem) and the large bold tropical leaves and striking flowers
make for a terrific display and should be planted in full sun and a sheltered location away from strong
winds. Plant the rhizomes, with the growing points facing upwards, 100mm deep with 500mm spacing
between each one for a superb summer display and then water thoroughly.
It is highly recommended to use a soil thermometer probe before the planting of summer bulbs, then one
can be sure the necessary soil temperature of 13c has been reached for a successful summer bloom.
Hello everyone, Green Landscapes Cornwall are sharing with you some ideas about how to implement different features for your garden!