Best time to plant some new roses

SCENT By an Angel was released just last year. PICTURE / SUPPLIED

We are now in the first official month of winter, with some colder nights over the past few weeks confirming the change of season.
Now is the best time of the year to be planting roses. New stocks have been filling stores and there are some wonderful varieties available.

I personally love roses, they really are an impressive plant. There are few plants that can boast the growth rate and extent of flowering that a good rose will provide. A rose bush purchased now — that looks like a group of sticks in a pot — will, by November be 60-80cm high producing a mass of eye popping colourful blooms, that can, depending on the variety, repeat flower throughout summer and well into next autumn.

New varieties have been selected and bred for hundreds of years to gain the desired flower form, colour, fragrance or a combination of all of these. In recent years rose breeders have developed varieties that will thrive with little or no spraying. This has helped to balance the scales between people wanting to have low maintenance gardens, but also wanting to have some flamboyant colour and scent in the garden. There are some stunning varieties that are not only colourful, but are highly fragrant and healthy growers. Roses also come in a number of forms including, the well known "ordinary" or bush rose, standard roses (two main stem heights are common, 800mm, 450mm and less commonly 1.8m) and climbing varieties.

Gardeners for centuries have revered the rose as "Queen of the shrubs" for the extraordinary beauty of its flowers. There are so many different roses in so many flower colours, shapes, fragrance and plant height that there really is a rose for every situation and garden style. Few plants are so versatile and varied in growth habit, height, foliage and form. It is possible to smother the whole garden with roses. Whether grown en masse or singly to heighten the profusion of a mixed planting, roses epitomise the glory of the garden on a summer's day. Be inspired to grow some roses in your garden. If you are limited on space then growing in pots is a good way to ensure some bright colour on the patio for summer.

Modern roses today come in virtually every colour of the spectrum from pale pastels to bold, bright reds and yellows. A rare colour in roses is found in "Blue Moon", which has lavender blue flowers on long stems.

The old garden roses range in colour from white, through the palest of blush pinks, deep pink, crimson and violet to purple. Many have striped pink and white or purple and white flowers.

Most roses co-ordinate well but a combination of too many brilliant colours may create a discordant effect. Plant white roses or those with soft pastel tones between your groups of strong coloured roses to prevent them from clashing.
Within the rose family is a great variety of flower shapes from single flat open, such as "Mutabilis", to the urn shaped curved modern hybrid tea types such as well known "Aotearoa" and "Lasting Love" and then there are the cabbage-like types of many old rose flowers.

Foliage colour of roses varies from a soft grey green to a deep glossy blue-green. Some species are a dusky plum purple and the foliage of some turn to vivid fiery autumn colours. Some rugosa and species roses develop bright ornamental hips in autumn that range from yellow and orange though all the shades of red.
"Absolutely Fabulous" displays good vigour and excellent health with good resistance to black spot. Its flowers are truly stunning with butter gold blooms, and a delicious strong fragrance.
Rose "Purpleicious" is a recently released rose is a good performer in the garden. This beauty is a deep purple with a delicious fragrance. It has a flat, old fashioned flower form and grows approximately 80cm.

A new release last year is "Scent By An Angel". It features blooms with a heavy perfume that are deep magenta pink in colour that pale to a soft pink. It is a floribunda type rose produces masses of flowers in clusters for months through out summer.

Rose planting tips
It is generally expected that a rose will remain for many years. Preparation of the soil is therefore important. The ground should be cultivated about two lengths of your spade blade or about 450mm. Most soils will benefit by incorporating material such as Natural Bark Poultry Compost or sheep pellets. The digging will open up soils, improving the general structure. In a light soil the water holding capacity will be greatly increased as the organic material can hold additional moisture. The addition of slow release tablets into the hole when planting will help ensure excellent root development and growth.

Roses are never completely dormant and the less the roots are disturbed the better the plants will establish. A hole should be dug significantly large and deep to accommodate the roots when they are spread out. Be careful that no damage is done to the plants when the soil is firmed round the roots. The bud union of bush and climbing roses is left just above the ground surface.

If planting a group of standard roses they should all be the same height so that they can be planted with the heads at a uniform level. It is preferable before planting standard roses to put in the stakes that will support them. This avoids damage to the roots which may otherwise occur. Use a soft tie material for tying standard roses. Wire should never be used and padding should be placed under a tie of twine or cord. Ensure that one of the ties is secured to its stake near the head of the rose to prevent damage or the possibility of it snapping off in strong wind.

Plants from a garden centre or nursery have usually been cut back for the ease of handling and packing, and in some cases may require extra pruning. Early planting (now) is recommended and pruning should be done during the normal pruning season — mid to late July for gardens in Whanganui. More on pruning roses when it is time!

Gareth Carter is General Manager of Springvale Garden Centre.