Will my neighbour smell it?

I would be tempted to run power to it. Fit a carbon filter and extractor fan and duct out of the greenhouse. That will kill most the smell. The white widows will pump out a fair smell.

Hey mouse. Thank you for your tips. I already planted some dills. I only got 1 lavender. The lavender seeds germinate very slow. I do have a sachet of mint seeds but I don't think they will be big enough at that time. Maybe I should put less plants in the greenhouse. But i don't want to miss the good chance now the summer is at our door. Our basement is full. Initial plan was to put a growtent and 2 lights but I will have to postpone it. I prefer growing inside since it's discrete.

Once it enters flowering stage there is a high chance they may smell it. Some strains will smell more and others less. I grew out two plants on my deck once and all year it smelt like skunk weed. so strong, another time I grew 4 plants "different strains" and they did not smell that much. You want to grow out 20 plants, so I feel if the wind if blowing in that direction they will smell it. Plant a shit ton of aromatic herbs like mints "spearmint, strawberry mint, catnip, catmint, lemon balm" and others like sages/lavenders/dills/chives aorund the tent to help mask its smell. Some basic flowers may help too, marigolds are always popular. On top of this the majority of the mentioned plants above will bring in predators and pollinators to your garden in mass. Just get seeds and scatter them in worked soil. water daily to keep top soil moist sometimes twice a day till you get sprouts. Mint is aggressive though and will come back every year if its a frost hardy version. Good Luck!

The zipdoor of the greenhouse will be at that point where i am standing with the back towards the hague fence. I never grew cannabis so I don't know how much the plants smell.