I did this to mine but it took about 3 weeks for any change in the right direction
Peter
"Wingnut" wrote in message u...
Anybody got any suggestions as to what may be causing yellowing of the leaves on my Grevillea spp. especially at the top of the plant.

I've been told that it might be an iron deficiency so I've tried adding chelated iron but to little effect, it seems.

Comments welcome.

Steve