Keep your plants happy in a heat wave
We’re used to our long, hot and harsh summers here in Australia. For avid gardeners this can prove a tough few months when plants wither despite our best efforts. If you’re in for another hot one, here are some ways to help your garden thrive (or at least survive) this summer.
Mulch. Your garden beds should be mulched which will keep soil and roots cool and retain moisture around roots. If you haven’t done it already, do it!
Water well. Hot weather can quickly dehydrate shallow roots and can cause trees to shut shutdown to avoid further water loss. Water your plants deeply particularly if you are expecting a hot spell. Watering should be done early in the morning to prevent heat scald and evaporation.
Provide shade. During the hottest times of the day or when you know there will be an especially hot week, provide a temporary shade structure for plants that looked stressed or may be susceptible such as small plants, veggies and herbs. Shading them will reduce water loss, provide a humid environment and prevent foliage from sunscald. Plants don’t need to be enclosed in shade – just on one side or above will help.
Don’t cut. It might be tempting to remove damaged foliage but it’s actually providing shade and protection for growth below. Wait until the hot weather has passed.
No fertiliser. Don’t fertilise in hot weather as the dry soil will increase risk of fertiliser burn and encourage plants not to cope with hot conditions. Wait until the weather cools down before applying.
Move pots. During the hottest weather move pots into shaded position or into the early morning sun if needed. If you are moving them back into the sun after a long period in the shade, make the move gradually. In a heatwave your pots will need frequent watering.
Long lawns. Leave grass to grow as it helps the roots grow deeper and drought tolerant. The long grass will create shade for the roots which help retain moisture.