GARDEN
GARDENING COLUMN NOVEMBER 2019
Are you concerned with the terrible dry period that seems to have been going on now in our district for a few years? The relentless decline in average rainfalls seems to be getting worse this summer season as well the higher than average temperatures looks like we are going to experience these drought conditions a while longer. At least we can look at what we can do to ensure our gardens retain moisture for as long as possible. I can give a few handy tips that can be quite simple that will keep us a little more positive about our gardens while we endure these high temperatures and manage with soils that can now be prone to drying out very fast.
Firstly, we can investigate our soils. One of the biggest problems with water loss can be on a hot windy day, water from the top few centimetres of soils can quickly evaporate. If we are able to minimise this loss or at least slow it down, we are able to give our plants a fighting chance of survival in the upcoming months of summer weather extremes. Most of our shallow root systems plants can benefit from adding an insulating barrier that protects plants vulnerable surface roots from drying out. Plants like camellia, azalea, pines, and young rose bushes can be affected if these surface roots dye due to water loss. Even our treasured fruit production trees like citrus particularly benefit from applying a 50mm cover of mulch during these times of stress. As well the vegetable patch requires a mulch layer for our leafy green vegetables like lettuce, silver beet, corn, tomatoes and beans crops. Any kind of mulch really will help, though I have found that sugar cane and pea straw types are very efficient, quite cost effective even if used in our larger sized gardens. Once spread over our gardens soils it aids protection like a blanket over the surface, protects the soil from wind and baking hot temperatures. Make sure to keep mulches away from plants stems as this can cause stem rot problems over time. I also like to spray water over the top of mulches once firstly applied to prevent the drier mulches absorbing moisture directly from our garden that we are trying to protect. Dry mulches can also be lost in heavy winds so adding a small amount of water at the start settles mulches and prevents the water loses immediately.
We can also look at moisture control, pruning back of shrubs and bushes, limiting the size of our plants height or overall canopy reduces the need for the plant to require as much water as it was using. Take advantage of finished flowering spring shrubs by removing around a third of plants size by pruning back now. These include Grevillea, Callistemon, Acacias, as well Rose bushes, Camellias, and most hedging plants. Once completed harvesting, stone fruits like nectarines, peaches and soon mango varieties. Trim back the whole tree by a third to manage new growth that will bear next seasons fruit on healthy stronger new growth of branches. This done now will ensure more fruiting bud sites for next years crop as well as assisting the plants overall development. Essentially a smaller plant size requires a lot less water to maintain good health.
Plants that are grown in pots or containers may also benefit from a little extra attention at this time as well. If your pots soil dries out too much any water that is used to penetrate is generally lost down the side of the pot, this is called soil shrinkage and very little water remains for long enough for the plants roots to absorb it. This obvious waste can be reduced quite simply by adding granular wetting agents or liquid wetting agents for increased absorption of water to our potting soils. Most do have a fish emulsion product added to the solution already this gives dry roots a little stimulating effect, encourages better root systems driving roots down deeper into the soils can give our plants much more strength and ability to thrive in these adverse conditions much easier. Come into our nursery and discuss water saving techniques with us. We can offer many easy ways to help throughout this challenging season.
Keep
your ga
rden spirits up
Matt Gow