Its interesting that pot plants really do blend in with other plants to the point that they are unidentifiable by all but the most observant. I remember a relative of the family on a visit to Texas showed me his corn in the garden and I was standing 3' away from several pot plants before I recognized them for what they were.

Plants started outdoors late in the season never get very big and never attract the least bit of attention when placed next
to plants of similar or taller stature. Even tall plants grown among several trees will be almost invisible in their camouflage.

Outdoors the object is to control access to an area, and not to arouse suspicion. Tuck them here and there, never in a recognizable pattern. Space them out, and fit them in to the existing landscape such that they get full sun, but they're hidden or blend in. Fence lines and groups of several together are best. Try to find strains that seem to match the surrounding plants. Feed nitrogen to your plants if they need to be greener to blend in. Some growers even use plastic red flowers, pinned to a plant, disguising it as a flower bush.

Visit the plants at night on full moons, and if your visible to neighbors, appear to be pruning a tree, mowing the lawn, or
doing something in the yard that makes you invisible.

Dig a hole and put a potted plant in it. The plant's height will be reduced by at least a foot.

Some growers top the plant when it is 12" high, and grow the 2 tops horizontally along a trellis. The plant will never be over
3 feet tall, and never arouses suspicion from neighbors. This type of plant can even be grown in your yard in full view.
Many stories abound of having the neighbors over for a BBQ and nobody ever noticed the nice plants over by the fence...