![]() Wait until growth stops for fall fertilization. Fertilize in spring just as the shrubs begin to put on new growth. The optimum times for holly fertilization are spring and fall. Slow watering allows the fertilizer to sink into the soil rather than running off. Replace the mulch and water slowly and deeply after applying the fertilizer. Holly-tone recommends three cups per inch (1 L per 2.5 cm.) of trunk diameter for trees and one cup per inch (0.25 L per 2.5 cm.) of branch length for shrubs. When using Holly-tone or an azalea and camellia fertilizer, follow the directions on the container because formulations vary. Work the compost or manure into the top inch or two (2.5 or 5 cm.) of soil, taking care not to damage surface roots. The root zone extends about as far as the longest branch. If you are using a complete fertilizer with a nitrogen content of eight to ten percent, use one-half pound (0.25 kg.) of fertilizer for each half-inch (1 cm.) of trunk diameter.Īlternatively, spread three inches (7.5 cm.) of rich compost or two inches (5 cm.) of well-rotted livestock manure over the root zone. Pull back the mulch and apply the fertilizer directly to the soil around the holly. Holly-tone is a good example of this type of product. Some manufactures produce fertilizers designed specifically for hollies. Fertilizers formulated for broad-leaved evergreens (such as azaleas, rhododendrons, and camellias) work well for hollies, too. Fertilizers formulated for broad-leaved evergreens (such as azaleas, rhododendrons, and camellias) work well for hollies, too. Holly bushes like soil with a pH between 5.0 and 6.0, and some fertilizers can acidify the soil while fertilizing holly bushes. With its squat, rounded habit, handsome evergreen foliage, and full, dense branching, Strongbox inkberry is a welcome alternative to boxwood. Holly bushes like soil with a pH between 5.0 and 6.0, and some fertilizers can acidify the soil while fertilizing holly bushes. ![]() For example, a fertilizer ratio of 10-20-20 contains 10 percent nitrogen. The first number of the three-number ratio on the fertilizer bag tells you the percentage of nitrogen. A complete fertilizer that contains eight to ten percent nitrogen is another good choice. Compost or well-rotted livestock manure makes excellent (and often free) slow-release fertilizers that continue to feed the plant throughout the season. Gardeners have lots of options when choosing a holly plant fertilizer. This article explains when and how to fertilize holly bushes. Strongbox is a female variety and will develop black berries if a compatible male pollinator is planted in the vicinity.Fertilizing hollies regularly leads to plants with good color and even growth, and it helps the shrubs resist insects and disease. If you wish to trim or prune it, do so in mid-late spring, after the new growth has emerged. Maintenance Notes: Little care is needed to enjoy Strongbox inkberry holly in your landscape. Strongbox inkberry holly is a bit broader and less rounded than our other inkberry holly, Gem Box. It has shallow roots, so a 2-3″ layer of mulch is a good idea. Plant Strongbox inkberry holly anywhere you'd use boxwood - as a hedge, edging, or specimen. Little care is needed to enjoy Strongbox inkberry holly in your landscape. Strongbox inkberry holly is a bit broader and less rounded than our other inkberry holly, Gem Box ®. Plant Strongbox inkberry holly anywhere you’d use boxwood – as a hedge, edging, or specimen. Resistant to disease, pests, and winter burn.Top reasons to grow Strongbox ® inkberry holly: ![]() ![]() It can be pruned or shaped as you desire, or left to attain its neat natural shape. Available in better garden centers in spring 2019. This native evergreen naturally grows as a broadly rounded mound, and keeps its leaves all the way to the ground for the lush, dense look you love. It’s also much faster growing than boxwood, and offers good deer resistance, too. Yaupon can withstand a broad range of conditions, including wet sites. This native evergreen naturally grows as a broadly rounded mound, and keeps its leaves all the way to the ground for the lush, dense look you love. A native alternative to boxwood, Strongbox Holly is a compact, evergreen, naturally mounded shrub that offers resistance to deer, disease, and winter burn. Strongbox inkberry holly Red-Berried Options Ilex vomitoria, or yaupon holly, is another US-native, small-leaved holly it’s a great substitute for I. Love boxwood but struggle with disease or winter damage? Plant Strongbox ® inkberry holly instead.
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