Evening Richard @richard.spicer.7906 I don’t think either of them are, it’s strange as they are in the same pots the same compost and about 6 feet apart so one doesn’t get more sun than the other both the same 🤔 any ideas?
Potentially, I think maybe one of them might be struggling to take up nutrients if they are not in acidic soil. If the other looks fine it’s possible it could start at a later time. But might be best to see a pic of them side by side. If it’s gone a lighter green/yellowish colour then likely to be soil/nutrient uptake related.