Tips for Landlords
Most Marihuana Grow Operations are set up in residential or commercial rental properties. Often the buildings are altered to accommodate equipment required to grow marihuana.
How to protect your property:

Obtain a credit history.
References should be mandatory and followed up.
Check the property regularly.
Be alert for signs of a potential grow operation including:

Foundation walls may be drilled to facilitate illegal wiring, other electrical rewiring/tampering in the home.
Tenants may be reluctant to allow landlords to inspect the property and may insist on paying rent in cash.
Check your property regularly:

A crop may take two to three months. Checking your property every four to five weeks is recommended.
If you suspect drug activity in your neighbourhood, do not investigate. Contact your local police.