Grass clippings and coffee grounds create nitrogen, but use them sparingly in compost. Banana peels offer potassium to the soil.Click to see full answer. Also know, 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.Additionally, what is the best fertilizer for lilacs? Bone meal is a great fertilizer for lilac bushes. This is because it makes soil more alkaline. It is a natural plant food easy for the lilac to intake. Fertilizing lilacs isn’t strictly necessary except after the first and second years of planting. Correspondingly, which plants like coffee grounds? Using Fresh Coffee Grounds For instance, you can sprinkle fresh coffee grounds around acid-loving plants like azaleas, hydrangeas, blueberries, and lilies. The use of fresh coffee grounds are thought to suppress weeds too, having some allelopathic properties, of which adversely affects tomato plants. What kind of soil do lilacs like?Grow lilacs in fertile, humus-rich, well-drained, neutral to alkaline soil (at a pH near 7.0). If your soil is in poor condition, add compost to enrich. Lilacs don’t like wet feet and will not bloom with too much water.