Hydrangea feeding for April

April is when hydrangeas start spending stored energy on new stems, leaves, and flower buds, so the food you give them now shows up later in the size of the bloom heads. Oregon State University says hydrangeas are in active growth from March through September, and Gardening Know How recommends spring feeding for stronger foliage and more flowers. (extension.oregonstate.edu) (gardeningknowhow.com) The first job is not fertilizer at all but soil. Oregon State University says hydrangeas do best in well-draining soil rich with organic matter, which is why a spring topdressing of compost helps like a pantry restock instead of an energy drink. (extension.oregonstate.edu) That compost layer does two things at once: it adds slow nutrients and helps the ground hold moisture without turning swampy. Hydrangeas are thirsty shrubs, and Oregon State University warns that both drought and waterlogged roots can damage leaves. (extension.oregonstate.edu) The second job is the actual feed, and the safest default is a balanced fertilizer instead of a heavy nitrogen blast. Gardening Know How says a general garden fertilizer such as 10-10-10 or 12-4-8 works for hydrangeas, while Ask Extension says the same balanced formulas are standard for spring feeding. (gardeningknowhow.com) (ask.extension.org) Balanced matters because nitrogen grows leaves, phosphorus supports roots and flowers, and potassium supports overall plant health. If the nitrogen side is too strong, you can end up with a big green shrub that spent April making foliage instead of bloom power. (gardeningknowhow.com) (ask.extension.org) Slow-release granules are the easiest April option because they feed over weeks instead of all at once. Ask Extension says granules are worked into the soil around the base, where they dissolve gradually and keep nutrients available through the first stretch of spring growth. (ask.extension.org) The third job is mulch, because fertilizer works better when the soil stays evenly damp. University of Maryland says mulch around the base helps maintain moisture, and a 2-to-3-inch layer is the usual target for insulating roots and cutting weed competition. (extension.umd.edu) (wikihow.com) Just do not pile mulch against the stems. Mulch touching the crown can trap dampness and invite rot, so leave a small bare ring a few inches wide around the base instead of making a mulch volcano. (wikihow.com) One April detail changes the plan for gardeners chasing blue flowers. Oregon State University says low-phosphate fertilizer is better for blue and purple hydrangeas because phosphate limits aluminum uptake, and aluminum in acidic soil is what shifts many hydrangea blooms toward blue. (extension.oregonstate.edu) (plants.ces.ncsu.edu) The part to skip in April is hard pruning unless you know your variety blooms on new wood, which means this year’s fresh growth. North Carolina State University says many hydrangeas bloom on last year’s wood, so cutting them back between late fall and early spring can wipe out that season’s flowers no matter how well you fed them. (plants.ces.ncsu.edu) So the April sequence is simple: add compost, apply a balanced slow-release feed, then lock in moisture with mulch. Done in that order, you are feeding the roots, steadying the soil, and giving the plant the best shot at carrying bigger flower heads into June and summer. (extension.oregonstate.edu) (gardeningknowhow.com)