Scorched looking leaves are the first sign of too much fertilizing. How to Grow Climbing Hydrangeas . The Royal Horticultural Society is the UK’s leading gardening charity. To lower the pH by one point, add one pound of ground sulfur per 100 square feet of garden area. It’s a good idea to check the soil pH annually, in spring. Lime results in pink and a change to either color takes time. In early summer, they produce fragrant, lacy … 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. Please note: white hydrangeas will not change color. You can also grow it as a shrub. Climbing hydrangeas typically don’t require fertilizer for the first three years of life and, after that, only if you notice foliage problems. If new foliage is yellow, suspect chlorosis and apply chelated iron to the soil, according to the directions on the package. Climbing hydrangea does best when grown in U.S. Department of Agriculture plant hardiness zones 4 through 9. Gardeners who practice good hydrangea care and feeding will be rewarded with luxurious foliage and glorious blooms. Fertilize too much and you'll get more foliage and diminished bloom. You should still fertilize your hydrangeas between late spring/early summer. Fertilizing at this time may stimulate new growth that will be too tender to withstand the winter. If you are thinking about adding climbing hydrangea (Hydrangea anomala) to the garden, consider that it initially grows excruciatingly slowly and may not flower for five to seven years after planting. If the fertilizer you choose is a slow-release type, remember to lightly cover it with soil to activate the fertilizer. Discover climbing hydrangeas. Fertilizer does not help this situation. It is a vigorous woody climbing vine plant growing to 30 to 50 ft (9 to 15 m) climbing by means of small aerial roots on the stems. An easy way to give plants an early season boost is to add a shovel or two of compost around the base of plants. Apply it to the soil; use a rake to blend it into the top inch or two of soil and water as you normally do. Be aware that nitrogen encourages leaf growth. In the South, a late May application and another in July would be about right. If older leaves turn yellow, the climbing hydrangea may need nitrogen. One of the most important things to know is to avoid over-feeding your hydrangeas. Don't fertilize after August. 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. Aficionados of the climbing hydrangea recommend that fertilizing should start in year two. If a soil test shows that your soil’s pH is too high, or alkaline, some nutrients become unavailable to the climbing hydrangea. Hydrangea petiolaris -the climbing hydrangea - is a species of Hydrangea native to the woodlands of Japan. Tips on Growing Climbing Hydrangea. petiolaris) are pruned AFTER the flowers fade in the summer. Join the RHS today and get 12 months for the price of 9. This can be remedied by fertilizing the climbing hydrangea with a 10-10-10 fertilizer, at the rate listed on the label. These varieties bloom on the previous season’s stems (“old wood”). (See more below.) Newly transplanted plants take a year or two to start major growth, 3 to 5 years for first flowering. Although the climbing hydrangea shouldn’t be fertilized at planting, it does require fertile soil and a pH that is either neutral (7.0) or acidic (below 7.0). Include a light bi-annual dose of liquid iron to keep the leaves a healthy green. Don’t apply fertilizer after August. Step 5: Fertilize Starting In 2nd Year. Hydrangeas treated with sulfur will remain or turn blue. If you have a re-blooming hydrangea, you can expect it to bloom, the flowers to fall off, and bloom again throughout the summer. Because it flowers, it can make shady locations colorful and pretty. Once the plant takes off, however, it’s a rugged flowering vine that requires little care other than consistently moist soil and protection from strong sunlight. Either a chemical source or organic matter can be used successfully. Therefore, how to feed hydrangeas is a common concern. All species of Hydrangea will benefit from fertilization. A climbing hydrangea plant grows 30 to 80 feet (9-24 m.) tall, but it tolerates pruning to shorter heights. How to fertilize hydrangeas is just as important as what you’re fertilizing hydrangeas with. She holds a Bachelor of Arts in English with a concentration in creative writing. The plants can also be … The flowers are produced in flat corymbs 15–25 cm diameter in mid-summer. Get involved. More northern areas may wish to fertilize only once in June or July. Do not fertilize at this time. Chlorosis, an iron deficiency, is common when the pH becomes too high for the climbing hydrangea to absorb iron from the soil. No fertilizer is required after the plant matures. Design Considerations. Climbing hydrangea can be utilized as a low growing ground cover, a low, dense shrub, or a vine. Fertilize … Applying a once a year slow-release chemical formulated for shrubs and trees is the simplest solution to hydrangea care and feeding. Apply a 3-inch layer of mulch to help retain water in the ground around the root zone and reduce weeds. Hydrangeas should be lightly dressed with fast-release fertilizer in March, May, and July. Also avoid the use of quick-release fertilizers that are high in nitrogen, the first of the three numbers on a package of fertilizer. How to Fertilize Hydrangeas Fertilizing hydrangeas can be a tricky task. If the pH is over 7.0 reapply the chelated iron to prevent yellow foliage. Fall is the time for hydrangeas to begin preparing for dormancy. One of its best features is it's not high maintenance!