Pillar roses are a 1.5m stem with multiple buds grafted up it. The result in the garden is a pillar of vibrant colour. Weeping roses make the perfect centre piece of feature for a garden area. Grafted at a height of 1.8m these will weep down the stem producing a cascade of spectacular flowers. Flower carpet and low growing varieties have real flower power. Flower carpet roses are a popular choice to add height and form to rose and garden beds. Scented roses are a great choice for entrances, lining paths and under windows.
Rose planting tips
When a rose is being planted it is generally expected that it will remain in existence for many years. The 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 'Tui Rose and Shrub Mix', 'Ican Premium Planting Mix' or 'Tui Sheep Pellets'. The digging will open the soil improving the general structure. In a light soil the water holding capacity will be greatly increased as the additional organic material can hold greater moisture. The addition of 'Ican Slow Food' 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 plant 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 above the ground surface – the same level as it was planting in the pot it was purchased in.
If planting a group of standard roses it is preferable before planting to put in the stakes that will support them. This avoids damage to the roots which may occur if they are added later. 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 which is best done in mid to late July for gardens in Whanganui. More on pruning roses when it is time or check out the Springvale Garden Centre website.
The challenge with locations such as Whanganui having milder winters is that some plants that benefit from a period of dormancy struggle to know what season they are in. Cold weather is beneficial for the garden as it kills off many warm season insects and allows plants that require it a rest.
It is now more beneficial than ever before to spray your roses in June with lime sulphur. This will hasten the dropping of leaves as well as kill fungus spores and overwintering scale and other insects that may be lingering.
Sprays of the organic combo En Spray 99 (oil) and Free-Flo Copper should be made following pruning in July. If there is an obvious presence of overwintering scale, other insects or black spot was bad then an additional earlier spray in late June will help to further control pest and disease incidence for the coming season.
• Gareth Carter is general manager of Springvale Garden Centre. For more information look up their website: www.springvalegardencentre.co.nz
