Chlorosis? How to balance out my soil?

Some rasberry plants in our garden are having this issue with decolouring leaves, while some others beside are doing fine... I'm told this is chlorosis, due to a lack of Iron. What can I do?

The best way to deal with this problem is a chelate of iron for fastest results, then you want to use a granite rock dust worked into the top few inches of soil for longer lasting iron availability.
I suspect that the soil is not rich in fungal organisms so you might want to consider using a mycorrhizae product around each plant at the root ball location, this will help the plants with their calls to bacteria via exudates and it will also help with all other aspects of the root functions.

Redhawk

Do you know the pH of your soil? I found my raspberries did a lot better once I put some sulphur down to lower the pH a bit- soil that is too alkaline meant that the plants couldn't access the iron that was there.

Most rose family members like a pH about 6.5ish. Also if you concerned with iron you can always use rusty nails as a slow release.