With the temperatures still rising mulching is now crucial. We have been spreading heaps of this rice hull mulch.
This is inexpensive, easy to spread around delicate plants and very effective as water retainer and weed suppressor. It also lasts a very long time and though it has little nutritional value it does add excellent organic fibre to our sandy soils.
There are a couple of downsides to be wary of though. It can be very dusty when you spread it, so a mask is a good idea. And rain tends to run off it so unless it is arranged in such a way that water penetrates some areas it can actually prevent water access to the soil.