Hi Tracey,

Iron chelates should rectify the problem with the chlorosis in the leaves.
But knowing Mindarie there is a lot of capstone below the surface. My
suggestion would be to either put an azalea mix from your local garden
centre as a mulch or visit the Yanchep pine plantation and gather some pine
needles both are acidic. The pine needles are an excellent mulch and break
down to a nice soil. Top ups would be necessary as it breaks down. Added
bonus is less weeds.

Now just bud an imperil mandarin and a navel orange onto the tree as they
are so much nicer than grapefruit!lol

Cheers

Richard




"tracey" wrote in message
...
hi everyone, i live near mindarie in perth, where there is lots of
limestone. i was just wondering what others in a circumstance wehere they
live on almost a limestone pad, do to combat the alkalinity? any tips?
currently i put trace elemets, iron chelets on. but i dont know if i
amdonig
enough. the grapefruit tree i have, still has green veins and yellowing
leaves. not sure what to do. how long does it take after adding back
nutrients to u notice a change.

and, what fertilizers does everyone use?

thanks in advance

tracey