Plants which possess silver foliage can compliment a garden in many different ways, they provide a distinct contrast planted alongside green foliage and they can provide an all year round interest, brightening up an otherwise lacklustre area of the garden. But, it is not only a dull area that can benefit from the addition of a glaucous colour, a great attribute of silver/grey foliage is the ability to reflect sunlight and conserve water, this is enhanced by the hairy type foliage or a waxy texture of the leaves which many possess.

Many of theses plants are native to hot and dry areas and therefore drought tolerant, requiring low maintenance and will perform well in a full sun area of the garden with well drained soil.

Silver foliage adds elegance and a cool sophistication to the garden and can be found on large trees down to small ground cover shrubs and perennials. Eucalyptus, the snow gum tree, is one of the hardiest of Eucalyptus and the grey
tinged leaves on white twigs radiates an impression of silver, complimented by a grey /white smooth trunk.

Pittosporum tenuifolium ‘Silver Queen’ is a large shrub which can grow to a height of four metres. Its latin name denotes thin leaves, these having white markings on the edges, giving an affect of a silvery foliage. It is an ideal plant for coastal areas. Popular small to mid-sized shrubs are lavender and Helichrysum, both release pleasant aromas, the latter being more known as the Curry plant due to its distinct curry fragrance.

With regards to small shrubs and perennials, there are plenty available and more to choose from. Convolvulus cneorm is a small shrub native to the mediterranean and displays silk grey hairs on its evergreen foliage, hence it being more known as the Silver Bush.  Santolina or Cotton lavender is ideal for ground cover and filling in gaps within the borders, the yellow pompom flowers provide a nice contrast with the silver fragrant foliage.

Another popular ground cover is the perennial Lambs Ear or
​. It is also known as Silver Carpet and has oval, woolly silver leaves with fine hairs and is suitable for the front of borders, covering areas with its carpet, mat forming
characteristics. There are numerous other silver foliage plants, the following are popular;

- Senecio cineraria/Silver Dust
- Sea Holly/ Eryngiums.
- Cardoon/Cynara cardunculus
- Bluebeard/Caryopteris
- Honeywort/Cerinthe major
- Rose Campion/Lychnis coronaria
- Brunnera macrophylla/Jack Frost

If not already in possession of silver leaf plants, then why not incorporate some into the garden, either in shade or full sun areas and if every cloud has a silver lining, then surely every garden should have some silver foliage.

​December is an ideal time to plan a garden reset or makeover in preparation for the following spring and if not practising already why not try cold frame gardening.

Cold frame gardening is a method of planting different types of green life, mainly produce, in a microclimate created by a man-made structure.

The addition of a cold frame within the garden enables the growing season to be extended. They are versatile, require little surface area, ideal for a small garden and are easy to build, alternatively, they can be purchased flat pack or ready-made from an established retailer.

Essentially a cold frame is a bottomless box with a skylight, a halfway house between a greenhouse and exterior planting.
They can be positioned directly onto any garden bed and assist in warming bare soil in early spring.

The transparent lid allows the sunlight to enter and simultaneously prevents heat loss by convection which would otherwise normally occur, particularly during the night. Thus, a microclimate is generated with an increase in soil and air temperature and also providing protection against the elements, such as strong wind, rain, hail and even snow. Plants can be started earlier in spring, such as seedlings which can then be transplanted to open ground once established.

A variety of produce can be grown in a cold frame, the most popular being lettuce, spinach, kale and green onions. However, a variety of root vegetables and brassica can be grown too.

When deciding to position the cold frame, take in consideration that full sun is essential and the transparent cover should slope downwards at a slight angle facing southwards to absorb the heat from the sun and to allow for rain run off.

A cold frame can be constructed from any material, the sides being of a solid material such as wood or masonry and the top being of a transparent material such as glass. A wooden structure can look aesthetically pleasing as well as being portable too, whereas, brick or block structure will be a more permanent feature and choice of location should be greatly
considered before building.

The most simple method of construction being straw bales used as sides and an old disused glass window or door placed on top. Imagination is key!

It can be designed and built to suit your particular needs, hinges and handles attached for ease of opening the cover and if preferred one crop could occupy the entire cold frame or a combination of crops in rotation to provide produce throughout the year. It is important to ensure the transparent cover is clear from any debris, as this will inhibit heat absorption and with crops being under cover, regular watering will be required. Increased humidity can be a problem within a small enclosed area, therefore, allow for slight ventilation within the cold frame structure.

Specific frame designs are available so they can be positioned on a hard landscaped surface such as paving. These can take on the appearance of a miniature greenhouse and more suitable for potted plants.

Cold frames are cheap to buy, easy to build and easy to maintain. They can be sited directly onto a garden bed, gravel or a paved surface and are a valuable addition to any garden, large or small. A mobile and modular solution for growing plants, lower in price and occupying less space in comparison to a greenhouse, there are many advantages of
cold frame gardening.

​contribution from Oliver David Cook

Lavender is without doubt one of the most popular shrubs to be found in any garden and with good reason too, providing a plethora of pleasures from the amazing aroma to the wonderful lilac flowers, particularly as they sway hither and thither in a gentle summer breeze. Planted alongside paths and walkways, as a small hedge, the perfume emitted is
therapeutic for the person, whilst at the same time attracting butterflies and bees. Planting lavender in clumps or in hedge form ensues a profusion of blossom and is more beneficial for the insects as it means they can jump from flower to flower with ease, compared to a sporadic planting plan.

Towards the end of August is the favourable time to prune and harvest the flowers, the soil temperature is at its warmest and once pruned the plant will have an opportunity to grow new shoots before the approaching winter, these shoots will then spring into life the following year.

Lavender angustifolia is by far the most suitable to grow here in the UK, the varieties Hidcote and Munstead being the most popular, the latter producing a slightly darker flower.

Both fall into the RHS pruning group 10 classification, meaning they flower on new wood and regular pruning will prevent them from becoming too woody.

The best time of day to harvest lavender for its aromatic properties is early morning, during this time the oils of the flowers are most profound. As the daytime temperature increases the fragrant oils dissipate and the flowers will then begin to open up more and this is the desired time to harvest for decorative purposes.

It is important to use sharp secateurs or shears for pruning as a clean cut is essential and one must avoid from cutting too low into the wood stem section as this will prohibit any new growth which is formed on the upper section only. Aim for cutting one third of the leaf section and in doing so forming a nice evenly rounded mound for aesthetic purposes
too.

The cut stems and flowers can be bundled together with an elastic band or garden twine and hung for drying away from direct sunlight and in a dry sheltered location. Once the lavender has dried, approximately 3 weeks, the buds can be rubbed or shaken off and stored in a lidded jar.

There are numerous applications for dried lavender with imagination being key. The reputed therapeutic benefits include induced calmness, promoting sleep and lowering the heart rate all attributing to a more relaxed state.

To enhance the aromas of the house, dried lavender can be used to aid cleaning with a sprinkling of the flowers on carpet prior to vacuuming to release the fragrance.

Lavender oils also have multitudinous benefits and uses and a visit to the UK’s most southerly lavender farm based here in Cornwall is highly recommended. Here a wide range of products can be purchased, providing much inspiration too.

https://www.cornwall-lavender.co.uk/

Contribution by Oliver David Cook on behalf of Green Landscapes Cornwall Ltd