Sign up for our newsletter. In the South, a late May application and another in July would be about right. © Copyright 2020 Hearst Communications, Inc. Northern California Gardening: Katherine Grace. A good all purpose 12-4-8 to 10-10-10 composition will provide all the fertilizing hydrangeas need. Time this dose of hydrangea fertilizer for early in the season, when plants are leafing out. Adding pine bark or pine needles to the compost-based mulch you use in spring will help lower the soil’s pH. Be aware that nitrogen encourages leaf growth. Because the vines become so large and heavy over time, be sure that the host structure can support the weight of the vines. If the fertilizer you choose is a slow-release type, remember to lightly cover it with soil to activate the fertilizer. Either a chemical source or organic matter can be used successfully. Based in the American Southwest, Bridget Kelly has been writing about gardening and real estate since 2005. Climbing hydrangea needs a rich, moist, well-drained soil. She holds a Bachelor of Arts in English with a concentration in creative writing. If a soil test shows that your soil’s pH is too high, or alkaline, some nutrients become unavailable to the climbing hydrangea. are easier for climbing hydrangea’s aerial roots to attach to than vinyl or metal. This can be remedied by fertilizing the climbing hydrangea with a 10-10-10 fertilizer, at the rate listed on the label. A discussion of how to fertilize hydrangeas wouldn’t be complete without mentioning the addition of small amounts of sulfur or lime when fertilizing to change hydrangea color. Climbing hydrangeas are flowering deciduous vines. Hydrangea care and feeding is fairly simple once you learn some basic rules. Include a light bi-annual dose of liquid iron to keep the leaves a healthy green. Specially formulated hydrangea fertilizer is available but isnt really necessary. You don't see climbing hydrangeas (Hydrangea anomala petiolaris) as often as the shrub types, but it is one of the more spectacular members of the hydrangea … Find more gardening information on Gardening Know How: Keep up to date with all that's happening in and around the garden. Getting climbing hydrangea to climb up trellises, arbors or other supports is possible as long as the support is strong enough to hold up the heavy weight of a mature climbing hydrangea. Scorched looking leaves are the first sign of too much fertilizing. The climbing hydrangea is a lovely vine grower that flowers. Sandy soil typically lacks important nutrients, but amending it with compost or well-rotted manure will add enough nutrients to give the climbing hydrangea a strong, healthy start. Step 5: Fertilize Starting In 2nd Year. Do not fertilize at this time. Hydrangea petiolaris -the climbing hydrangea - is a species of Hydrangea native to the woodlands of Japan. Gardeners who practice good hydrangea care and feeding will be rewarded with luxurious foliage and glorious blooms. Apply a 3-inch layer of mulch to help retain water in the ground around the root zone and reduce weeds. The Royal Horticultural Society is the UK’s leading gardening charity. Fertilize … Be sure to spread it around the drip line of the branches and not the base. As for what to use to naturally fertilize hydrangeas, a combination of sulfur, compost and peat moss has proved to be a successful hydrangea fertilizer. Either a chemical source or organic matter can be used successfully. Petiolaris – Climbing Hydrangea, Gardener’s Supply Company: Building Healthy Soil, Ohio State University: Hydrangea Anomala Subspecies Petiolaris. Don't fertilize after August. Therefore, how to feed hydrangeas is a common concern. 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