Can you please tell me what it is I'm growing??

to NGA

You are growing an edible weed called Lamb's Quarters.

I agree with Daisy, it looks like Lambsquarters ... possibly Lambsquarters (Chenopodium album)

Moved to the Plant ID forum so it can be marked as Solved.

COMON NAME IN N.Z.(fat hen) and is edible as a spinich substitute---the triloble leaf plant at base looks like oxalis and can be very hard to eradicate--if you dig down deep and it has pink/white bulbs that flake when rubed between fingers I would put all bulbs in trash as each scale that comes off bulb will grow new pests