keith kent wrote:
Hello ,i have a Calamondin and a Lemon tree.
I continue to struggle to get nice green leafs , i have been feeding with a
winter and summer citrus feed in rain water.
I have tested with a TDS meter the strength of the summer feed 150 ppm and
it seems very weak to me as i would think they are heavy feeders.Standard
plant feed are approx 1000 ppm or more .
What is the best feed to use ?

Dunno what the best feed to use is, but mine get whichever of orchid
feed or their proper citrus feed is going at the time they need it in
rainwater. I only water them again when the compost looks dry.

Overwatering can also cause yellowing of the leaves and is a quick way
to kill them. I never bother to measure the strength.

The orchids also sometimes get the citrus feed and don't seem to mind.

Regards,
Martin Brown