Proper nozzles to water flowers (9)

I believe the answer is:

primroses

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'water flowers' is the definition.
'primroses' can be an answer for 'flowers' (I've seen this before). I am not sure about the 'water' bit.

'proper nozzles' is the wordplay.
'proper' becomes 'prim' (prim and proper).
'nozzles' becomes 'roses' (I've seen this in another clue).
'prim'+'roses'='PRIMROSES'

'to' is the link.

Can you help me to learn more?

(Other definitions for primroses that I've seen before include "Promisers or pretty yellow flowers" , "plants" .)

I've seen this clue in The Times and The Sunday Times.

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