What to Do About White Spots on Mint Leaves
It’s always a worrying sign for gardeners when the appearance of plant leaves starts to change. One issue that some gardeners come across when growing mint is the development of white spots on the mint leaves. Here are the most common reasons why the white spots appear.
Presence of Spider Mites
Spider mites are one of several suckling pests that can damage the leaves of mint plants. The white spots you see on the mint leaves might be the web that these pests leave behind. The white spots might also be caused by the fact that pests like spider mites like to suck the plants dry. Despite their tiny size, they can do quite some damage by sucking out the fluid that keeps the mint leaves in good shape.
There are a number of ways you can get rid of pests like spider mites from your mint plant leaves. If the plant is small enough, one way is to “drown” the leaves of the mint plant in a bucket of water to suffocate the pests. Pay special attention to the underside of the leaves as that the part of the plant where pests like to reside.
Issues with Watering
If you don’t see any signs of pests on the mint leaves then the next likely culprit is your plant watering habit. White and yellow spots may start to appear on the mint leaves if you are under-watering or over-watering the soil. Over-watering tends to be more damaging. Too much water can clog the soil and prevent the plant from getting the water and nutrient it needs to grow healthy leaves.
Over-watering may also encourage the development of diseases like root rots, which may contribute to the wilted, spotty appearances of mint plant leaves. Mint plants don’t need much watering. Depending on external conditions, you could expect the plant to only require one to two inches of water per week. Make sure you check the dryness of the soil before you water the plant again. It shouldn’t feel damp.
Mint leaves had silver dot commonly old leave
My mint leaves once had a few tiny white spot appear along edge of leaf. I think it was some insects that caused it… Maybe thrip?
@Jon yeh – my mint leaves were covered with spider mites once. Pretty sure that explained the white spots that appear all over the leaves of the mint plant.