If you get in on an end-of-Summer plant sale or are just repotting some of your own, You can ensure these stay healthy by buying a box of matches! Add your plants to their pots, add 4-6 unused matches, and fill with soil. Matches are an excellent source of magnesium. The plants roots will soak this nutrient and produce fuller blooms. You can stick some matches in your planted flowers too. Push into the soil with the head buried.