If you only have a few plants, this is super-great advice from Elaine. I typically only use that 3 in 1 in the fall, before bringing my hoard of plants inside. I have to use a hose-end sprayer since I have so many plants.
I have never drenched with diluted hydrogen peroxide, but I see so many saying it works great (and is safe to use inside) that I will try it on my plants inside the solarium. What I will do is remove all the cards (I use 6 right now but when everything comes in in the fall, I double that amount) after using the peroxide drench, and hang fresh ones. I will know within weeks how effective the peroxide was. Another experiment!
Did I tell y'all I love to experiment?