Make sure that you or anyone who comes into your contact space is clean (don’t let anyone walk into your grow room directly from outside). Be especially cautious if the person has recently visited another grow space. No dogs, cats, rabbits or any other pets in your grow space.
In addition to shedding and possibly bringing in bugs, some cats will happily chew on your leaves and buds, so double reason not to let them anywhere near your plants! Spider mites do better in some environments than others. Luckily the conditions that make your plants happy are not that great for spider mites. So if you’re taking care of your plant’s environment, you’re also helping to prevent bugs and mold. Make sure you have great airflow in your room because spider mites thrive in stagnant air. Creating lots of air movement will not only help prevent spider mites, fungus gnats and mold, but your plants love it too! Maintaining a comfortable room temperature and a moderate amount of humidity in the grow room will help prevent or slow down a spider mite infestation. If you have an air intake from outside, make sure you have some sort of filter to keep bugs from getting in Sprinkle Diatomaceous Earth on top of your soil and all around your grow room – this all-natural remedy is safe for humans (we can even eat it) and works because it is very jagged on the microscopic level.
Tiny spider mites get ripped apart by diatomaceous earth while plants grow through it happily. Keep a close watch on your plants, and react quickly at the FIRST site of spider mites. If you’re growing just a small amount of marijuana for personal use and are really worried about spider mites, you might consider starting with seeds instead of clones. That way you don’t have to worry about accidentally getting cannabis zombie mites when starting from seed (plus you can choose to grow any strain you want!). Another way to help prevent some pests is to grow hydroponically, since spider mites and most pests are much less likely to thrive in a soilless environment! If you have a spider mite problem outdoors, you will want to… Don’t Bring Infected Plants Into Your Garden. For every new cannabis plant or clone: Use a handheld microscope to look for bugs on any new plants. Check closely for tiny spots on the leaves which could be spider mite bites. Also, check for eggs and tiny bugs underneath the leaves. Dip new clones or small plants in room temperature water treated with Safer Soap or Mighty Wash. If you can’t dip the plant, spray with a proven spider mite cure. Keep new plants in quarantine for at least a week and check regularly to ensure they have no bugs before you bring them around your other plants. If you’ve visited another cannabis grower, grow room or outdoor garden, it’s especially important to change your clothes and possibly shower before checking on your plants. You don’t want to infect your plants with spider mites that are already specialized in infecting cannabis plants! A healthy population of predatory insects like ladybugs will help kill off pests including spider mites. The “Western Predatory Mite” is another great defense against spider mites since they specialize in killing mites. Only use pesticides if you actually need them and avoid using broad-spectrum pesticides that kill lots of bugs indiscriminately. Instead, try to use narrow-spectrum pesticides that are meant to kill just the bugs you’re trying to get rid of. So for example, if you have caterpillars, use something that mostly kills just caterpillars (like BT Spray which pretty much only kills things like caterpillars and fungus gnats) instead of using a pesticide that kills all kinds of bugs including caterpillars. It will not only work better to get rid of the specific pest you’re having trouble with, but it also prevents you from possibly killing some predatory insects that may be protecting your garden. They Look Gross But They’re Already Eating Bad Bugs! Make sure you have the proper ground cover (cover your soil with a soil cover, weed barrier fabric, Diatomaceous Earth, or some other barrier). Basically, you want to prevent anything from being able to live or grow in the soil near your plants Make sure your plants are growing in a breezy area that doesn’t get too hot – spider mites love hot weather and stagnant air.
In addition to attracting pests, stagnant air can also trigger different types of mold, especially in the flowering stage!
Keep a close watch on your plants, and react quickly at the FIRST site of spider mites.