Reportedly whitewash pot for sand-loving plant (4,5)

'plant' is the definition.
(lyme grass is a kind of plant)

'reportedly whitewash pot for sand-loving' is the wordplay.
I cannot quite see how this works, but
'reportedly' could be 'e' (I've seen this in other clues) and 'e' is located in the answer.
'pot' could be 'grass' (cannabis) and 'grass' is found in the answer.
The remaining letters 'lym' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?