On one of my plants, the tips of the leaves are turning yellow. I'd say about a millimetre's worth or so. Is this due to lack of N?

Any help would be greatly appreciated.

Thanks!
Doctor Herbert Reviewed by Doctor Herbert on . Question on colour of leaves On one of my plants, the tips of the leaves are turning yellow. I'd say about a millimetre's worth or so. Is this due to lack of N? Any help would be greatly appreciated. Thanks! Rating: 5