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South Australia - June 14th 1999

 




 

 

 

 

 

 

 

 

Now that the grapevines have dropped all their leaves, it’s time to start pruning and you have about seven weeks in which to do it, so you can plan you weekends. Any later than that and the sap of some early varieties will start moving and the pruning cuts will weep.

If pruning Sultana grapes of the red or green varieties, you need to leave at least 10 buds on each cane or you will be pruning away next year’s fruit, since they do not flower and set fruit from spurs like other grape varieties.

Do not take your lead from some local Councils who are out now pruning the flowering purple-leaf plums in our streets, or you will get no flowers this spring. All spring flowering ornamental Apples, Peaches, Cherries and Plums are pruned in summer after their flowering season! I know ‘An expert is someone who has made all the mistakes’, but I say this every year and surely some of them read our Eastern Courier! Just try it on a few streets fellers. Summer pruning really does work. Your resident rate-payers will love you for it.

It’s still a bit early to be pruning roses, since they are still in growth. They can be left until July and even as late as first week in August. There are lots of pruning demonstrations planned by rose nurseries, councils and garden clubs over the next six weeks, that provide you with hands-on experience under expert tuition, if you feel you need some rose pruning guidance.

American pruning experts mostly agree that there is no need to paint small and medium sized pruning cuts with mastic or pruning sealant, since it impairs the healing process. The exception is where the wood is diseased, hollow or rotten and the natural plant hormones cannot respond from dead tissue.

After pruning your trees and shrubs spray them thoroughly with a copper based fungicide such as Bordeaux Mixture, Copper oxychoride or Kocide™. The later is the most expensive, but less threatening to earthworms. These sprays prevent the early spring spread of fungal diseases, which reduce flowering and fruit set.