just get the most smelling flowers or herbs you can get, ask in the garden center.
say to the in the garden center, that your neibour has dogs and they smell, and can they tell you the best plants to get to mask smell.
diff plants work in diff parts of the world.
what season is it were you are?.
also bamboo are good mixer iners if you put one at the side of your grow, it might help hide your grow.
must say though sweet peas, and lavender are the easyest to do, and cheapest.
good luck.
any pics of your grow?.
would like to see.