Clue: You may find gardener is transplanting red one? (7)
Answer: SERINGA
Explanation: Definition: You may find gardener is transplanting red one?
***(gardener is)** [anag:*transplanting*] would give "**SERINGA** red" 
 
 
*Seringa is a name given to at least two different plants, one a rubber tree and the other the mock orange.