Nursery

Roses

Frequently asked questions about growing roses

1. What soil type do roses prefer?

A. Roses thrive in free draining loam soils to which plenty of organic matter has been added. Sandy soils can support roses if attention is paid to soil renovation prior to planting.

2. How often do roses require irrigating?

A. Roses like all plants have a water requirement, the amount is dependent on the soil type they are growing in and the prevailing weather conditions. A general rule of thumb would be to be water deeply every four days and more frequently in dry times.

3. What is the best position for a rose?

A. Roses prefer to be grown in full sun and thrive best in climates with low humidity. Ensure good air flow around plants to assist in control of fungal diseases.

4. What should roses be fertilised with?

A. There are many fertilisers suitable for roses but the simplest way to ensure correct nutrition for your roses is to apply a complete rose fertiliser.

5. Why are there black spots on the leaves of my roses?

A. This is a common fungal problem called Black Spot. It is more prevalent in humid areas and can be controlled with the application of a fungicide such as Benlate, alternatively check with your nursery for resistant cultivars suitable for your area.

6. What pests and diseases affect roses?

A. Roses like all plants have a range of pests and diseases that may attack them at various times. The more common ones are: aphids, rose scale, thrips, Fuller's rose weevil, black spot, powdery mildew, downy mildew, botrytis, rose canker, anthracnose. Many of these problems can be overcome by keeping plants growing vigorously.

7. When should I prune my roses?

A. Pruning of roses is conducted in the winter dormant period. In areas that experience frost pruning should be done later in the season. Summer pruning is also recommended to remove spent flowers and improve air flow. Summer pruning should not be severe as this can hold plants back.

8. How do I prune roses?

A. Prune by a third to a vase shape in winter, removing any dead, damaged or diseased wood. Take out stems that are growing into the centre. Prune stems to outward facing buds. This vase shape will allow air movement into the rose, preventing humidity related problems that  roses are prone to. Another pruning in summer will rid any black spot and encourage another flush of flower.

9. When is the best time for planting roses?

A. Many rose varieties are now available as container plants all year round. Planting in mild climatic areas can be done anytime although the traditional period is late autumn early winter when field grown stock is lifted for retail sale.

10. Can I grow roses from cuttings?

A. Yes. Roses can be grown from hardwood cuttings and many gardeners have success with this method however it should be noted that many varieties do not do well on their own roots and usually budded onto more hardy understocks.

11. Why are roses so much work to grow?

A. Roses are no harder to grow than any other plant. The trick to successful rose culture is to supply the plant with its necessary requirements. These are: Free draining fertile soils, open sunny position, regular moisture during the growing season, control of any pests or diseases, pruning as required, removal of spent flowers, fertiliser applications during the growing season. Not really hard work for the beautiful blooms that result from your efforts.