(More Houseplant Week!)
I am sparing you a picture today.
So. Bugs. Gross, huh? This link from the Colorado State extension is a pretty good primer on everything that could freak you out about your houseplants. You’re welcome. But basically there are many gross bugs ready to infest your precious green pets, and three easy household weapons: Your shower sprayer, rubbing alchohol, and a solution of Dawn suspended in water.
Here’s what you do. Pick off any obvious bugs. Then give the plant, pot and all, a good thorough shower. That knocks a lot of little guys loose.
Even mouthwash sprayed or daubed will eliminate bugs. And half a teaspoon of old-fashioned Dawn or Ivory dishwashing liquid in a gallon of water makes a satisfactory insecticidal soap.
Keep your plants far enough away from each other that they’re not passing bugs like a high school case of mono and isolate any infested plants. A good dose of shame never hurt ‘em, either. (HOW DARE YOU BRING THAT FILTH INTO MY HOUSE, et cetera).
In sum: with constant vigilance, good hygiene, and some bathroom accoutrements, you too can keep some of the bugs off some of your plants, some of the time. For the rest of you pansies, there’s pesticides.
Two other gross but helpful tips today:
- Miracle Gro Organic Potting mix has a strong tendency to arrive absolutely infested with fungus gnats. FYI. I did not realize this until (of course, Supa’s Law) I had repotted several of my most fawned-over specimens. Luckily there’s tip number two:
- In which I say, you can sterilize potting soil in the microwave. It’s gross but possible. In small amounts, in a freezer bag with the top open or a plastic pot, put the potting mix in and nuke it for 15 minutes on 50% power. Some people do 2 and a half minutes on high. It’s your call. Either way, take it out and let it alone for 20 minutes to finish working and to cool down before handling or dumping it on your plants. It’s going to be hot.
I did this for a few pints of potting mix and it worked just fine for killing off those stupid annoying gnats. Just be warned that your microwave (and kitchen, too, probably) is going to smell a bit on the earthy side for about two days.

