Using Fresh Coffee Grounds For instance, you can sprinkle fresh coffee grounds around acid-loving plants like azaleas, hydrangeas, blueberries, and lilies. Many vegetables like slightly acidic soil, but tomatoes typically don’t respond well to the addition of coffee grounds.Click to see full answer. Keeping this in consideration, which plants like used coffee grounds? Fresh Coffee Grounds for Acid-Loving Plants Your acid-loving plants like hydrangeas, rhododendrons, azaleas, lily of the valley, blueberries, carrots, and radishes can get a boost from fresh grounds. However, tomatoes do not like fresh coffee grounds; keep them out of that area of the garden.Additionally, can you put too much coffee grounds in your garden? Because they are acidic, coffee grounds make good acid mulch. Of course, too much of anything is just too much, so apply coffee grounds in limited amounts. Working coffee grounds into the soil will improve its tilth, but do this sparingly unless you have acid-loving plants, like camellias and azaleas. Accordingly, which plants do not like coffee grounds? Coffee grounds are highly acidic, they note, so they should be reserved for acid-loving plants like azaleas and blueberries. And if your soil is already high in nitrogen, the extra boost from coffee grounds could stunt the growth of fruits and flowers.Do coffee grounds keep bugs away?According to the EPA, coffee grounds are a safe and effective way to keep pests away. Coffee grounds can help repel not only mosquitos but also other annoying insects like wasps and bees. Coffee grounds have a strong smell but it’s even stronger when they are burned. This smell will bother the pests and keep them away.