GARDEN
GARDENING COLUMN JANUARY 2020
This summer has been especially dry, hot and even very windy, with these natural factors combining with our already heat stressed plants can be discouraging in our gardens. We have even been watching decade’s old trees like eucalyptus and non-native pine trees, either dying back losing branch limbs one at a time. In some cases, eucalyptus as well-established large Moreton bay figs is trying to prevent moisture loss by shedding most of their leaves. This is a tree natural defence when facing these extremes and although it is shocking to observe gives our trees an easy way for minimizing water loss through their leaves. If this is occurring at the moment keep a record of extreme hot days or even weekly temperatures will help to understand this tough time in our gardens. The reaction that our plants give, may help to understand how to help them survive over the next few summer months ahead.
Many of our customers have commented they are noticing that there are a lot more shrubs and trees in glorious bloom this season as to previously. Jacaranda, Silky oaks, Poincianas have their dramatic floral displays in abundance this season. Even fruit and production plants, in our gardens are flowering heavier and longer currently. This shows an important sign that our plants are suffering with so much stress that they are producing many more flowers to be pollinated into a viable seed. The harmony of our natural world produces at great expense to our plant in an attempt to keep the future ongoing species success. Even producing such floral blooms can become more taxing on our plants and can be too much that the flowering plants may even drop fruits and other types of edible parts of our plants to minimize water being lost from the plant. All types of this occurrence are dramatic to see, though it is a very effective way nature can prevent plant deaths. So, what can we do to help our gardens?
When we water around our gardens do so with the best technique of deep root soaking once a week to prevent hot soils drying out. This will minimise water being wasted if only applied to surface feeding roots and produces a weaker plant overall. As well as keeping our plants alive above the surface this will encourage stronger, well developed roots that will grow deeper into soils creating a healthier plant, more resilient to heat stress and drought.
Soil conditioning and water saving wetting agents combined with fish emulsion can be applied to drying soils, they act to retain even moisture longer in soils and potting mixes. Even using grey water from the house can be effective in some instances where trees will need extra water; using recycled grey water can help. Be careful using recycled water around food production crops, as bacteria may be transferred from the water to your crop. Check also that you are using low phosphate washing liquid so that it doesn’t harm your natives, they really can’t cope with much phosphorous. I’ve found liquid washing soaps a little better than granular as it has less residual salt. By using grey water in my garden once a week to supplement my watering schedule helps on retaining moisture in my garden
If we are applying mulches to our gardens this slows water loss from evaporation, as well preventing weed growth, mulch helps to insulate surface roots from these tough conditions. By improving soils structure as the mulches break down to humus rich composted soils is a very effective way of recharging dry and compacted soils, as well helps with our worms to survive as well. Come into our nursery and talk to us about other water saving techniques, as we are always willing to help thru this dry hot summer.
Keep growing
Matt Gow