by maintaining a mulch of 'Gro-Cubes' which keeps roots moist and cool,
lowering humidity around the plant. Diseases thrive in humid
situations. Mulches supress weeds which also harbour disease as well as
pests. Ensure plenty of air circulation around the plants, direct
watering to the ground and not the foliage (which can remain wet at
night), prune bushes twice a year and deadhead regularly to maintain
robust growth which is less susceptible. Pick off diseased foliage as
soon as it noticed to prevent rapid spread of disease spores. Begin a
regular spray programme with black spot control chemicals as plants
come into spring growth and maintain this throughout the summer to keep
foliage disease free.
Try Swane's Low
Toxicity Control recipe in addition to the mainstream
chemicals : mix 3 teaspoons of bicarbonate of soda to a paste
consistency with a little water. Add that mixture to 2.5 tablespoons of
Pestoil. This is then blended with 4.5 litres of water. Keep it
agitated while spraying new foliage to the point of runoff. This needs
to be kept to a weekly cycle for best results. This programme has great
benefit when used in conjunction with proprietary rose sprays and good
cultural conditions. It
also has been proven that a regular application of a kelp or seaweed
based liquid fertiliser as a foliage spray helps to build the thickness
of the leaf cell wall thus aiding the resistance to disease.
Modern roses are easy to grow. They tolerate a wide range of climate
from hot to cold. Roses will bloom for up to nine months each year and
can live upwards of 100 years when given due care.
Roses need sun, a minimum of 5 hours uninterrupted per day.
Soil must drain freely, it is incorrect to assume that roses will
tolerate tight clay soil. In such positions it is best to build a berm
on which the plant can grow free of the soil that may have little
aeration due to high moisture content.
Exposure to strong winds will cause a higher than normal water demand.
Remember to water slowly and mulch often.
Following are our recommendations for minimum pot size for successful
cultivation of roses in containers.
>Miniature roses - bush or tree - 30cm diameter
Hybrid tea or floribunda bush roses - 40cm minimum diameter
Hybrid tea or floribunda tree roses - 50cm min. diameter
Weeping tree roses need heavy containers to prevent them being blown
over in wind - 100cm min diameter
Ground cover or China doll weeping - hanging baskets of not less than
Re pot roses grown in containers every 3 years. For best results do
this in July or early August when the rose is dormant. Remove the plant
from the pot, hose off or fork away the soil from the roots. Prune the
root system by approximately one third of the root mass. Prune the top
of the rose plant by approximately 40% to 60% of stem and re-pot into
fresh Swane's Potting or Rose Mix.
Thrips, two spotted mite and aphids are the most common rose pests.
Thrips and aphids can be deterred by spraying with domestic rose sprays
as well as Swane's organic style recipe, but two spotted mite is less
easily controlled. Seek the help of Swane's qualified staff for the
correct control methods or as a chemical alternative use a miticide
such as Kelthane. You may find that two spotted mite attack is
concentrated on a specific bush. Consider removal of any plant in the
garden where the mite continues to harbour and multiply. A small black
weevil which bores holes in buds and flowers can be controlled by the
use of the domestic rose sprays or Swane's organic recipe. Rose scales
can be controlled using lime sulphur after the winter prune or using
Swane's organic recipe during the summer months.