Im in new zealand aswell. I've never had a problem with nutes being expensive.
I grow in soil from bunnings or wherever, with 2 bottles of nutes to cover both veg and flower (and i never finish a bottle) and i get excellent results. I generally get a pound off 4 plants over a 3 month grow cycle. The problem most people have is that they over complicate things.
Hey ther I'm curious about the comment is that the levels of nutes I should be feeding
What nutes are you using from bunnings. I've always brought specific nutes made for the industry. Always wondered about using cheap ones and it sounds like your pulling a good haul.
Try feeding them some sulfates. That'll help cover them in some frost
Yes, do that. Potassium sulfate, magnesium sulfate, phosphorus sulfate. It's not a snake oil it helps with Trichomes formation and helps your plant reach its potentialNo. Do not do that.
Keep your fan leaves healthy and do not put any bullshit snake oil into your root system if you want your plant to grow to its genetic potential.