A physiological disorder affecting many plants, including roses. Foliage turns pale yellow, shrivels and drops to the ground. Growth is stunted and some times the plant dies. Chlorosis occurs mainly on chalky and limy soil and is probably caused by iron not being freely available. Sulphate of iron solution (1 oz. to 1 gallon of water) may be sprayed on to the foliage or the new sequestrene salts may be tried.

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