Strawberry gum

Here is my early flower strawberry gum(photo) 12/12 from seed n now she is about 5ft tall feeding with foxfarm line nutrients. First time leave it untrained to compare yield...do u think untrained plant do better than trained? (No veg time) 12/12

Personally I don’t know anyone with experience thinking yields are better on untrained plants indoors. That’s why we train and shape eh? And a bonus - no problems with them getting too close to the light and no more headspace.

U think this is powdery mildew?