Hi there
I'm looking after a garden that has quite a few G. Robyn Gordons that were planted in Sept 09. They have been looking nice and healthy until the last month or so, and now, their leaves are going yellow. The soil is sandy, full sun position with regular watering and mulched. Other native plants near are all fine.
Is this yellowing from too much water? too alkaline soil (nursery suggestion) ?
So, how can I rectify this? seasol or powerfeed ? molasses?
Also, in another area Callistemon Matthew Flinders were planted about 2 years ago and their leaves have reddish brown spots on them and have defoliated a fair bit. Any suggestions?
TIA