Let’s take the worst case scenario; a very hot, sunny day with very little breeze as the plant is nearing maturity and becoming very pungent. The sun and the heat cause the mono-terpenes and di-terpenes ? the molecules that we smell ? to evaporate and hang in the air. They slowly spread over a wider area. At 50 feet a single plant is smelled in wisps and wafts. The odor of three plants should spread no further than 100 feet. After that it gets too dilute to catch except with occasional wisps. During the hottest days, the plants are usually still in vegetative stage and they don’t have much odor. They start flowering as the intensity of the light is decreasing and the temperature is decreasing.
With cooler weather and a breeze, the intensity of the odor decreases and is diluted. It is much harder to catch a whiff and even harder to place the location of its origin.
Readers with grow questions (or answers) should send them to Ed at: Ask Ed, PMB 147, 530 Divisadero St., San Francisco, California 94117, USA. You can also email Ed at [email protected], and send queries via his websites at www.ask-ed.net. All featured questions will be rewarded with a copy of Ed’s new book, Best of Ask Ed: Your Marijuana Questions Answered. Sorry, Ed cannot send personal replies to your questions.