Fertilizing roses. Fertilization of roses is a must to encourage production of large, vigorous basal canes. A standard fertilization program calls for feeding three times per year using a 5-10-5 or similar analysis fertilizer. The first application should be made prior to bud break, at the same
time as spring pruning. The second application should be during the first flowering period. The third application is a late-season fertilization after the first flush of blooms has
faded and flowering has declined—no later than mid-August. Later fertilization will encourage succulent growth which will not be hardened-off by first frost. Roses are susceptible to iron chlorosis, which results in a light-yellow color on the leaves while the vines remain a
darker green. Iron chlorosis is a result of a lack of available iron to the plant. Iron chelate sprayed on the foliage will restore the green color to the foliage in a few days, but foliar
sprays are not long lasting. Acidify the soil around rose bushes by adding powdered sulfur at the rate of 1 to 2 teaspoons incorporated into the soil.
time as spring pruning. The second application should be during the first flowering period. The third application is a late-season fertilization after the first flush of blooms has
faded and flowering has declined—no later than mid-August. Later fertilization will encourage succulent growth which will not be hardened-off by first frost. Roses are susceptible to iron chlorosis, which results in a light-yellow color on the leaves while the vines remain a
darker green. Iron chlorosis is a result of a lack of available iron to the plant. Iron chelate sprayed on the foliage will restore the green color to the foliage in a few days, but foliar
sprays are not long lasting. Acidify the soil around rose bushes by adding powdered sulfur at the rate of 1 to 2 teaspoons incorporated into the soil.
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