planted about two months ago ,growing really well,
It is in a pot,have noticed some yellow leaves appearing at the extremities,should I be concerned?
So long as the pot is not dry, they should just be old leaves dropping off. Stand a saucer under the pot, or plunge it in a bucket once if week if you can. Very often with pots and this heat, the water doesn't soak in well, it just goes straight through, especially with the light multipurpose composts instead of loam based.
You don't stop doing new things because you get old, you get old because you stop doing new things.