These troubles can hardly, with perfect consistency, be included amongst Rose enemies, inasmuch as they are not the work of insects or fungi. They are, however, very real.
Roses frequently come with green centres when the plants are unhealthy or weak, rarely when they are vigorous and sound. The remedy, therefore, lies in improved cultivation. Those who treat soil and plants on the lines laid down in previous chapters will not, it is hoped, have much disappointment on this score.
"Blind" Roses, that is blooms which appear to become petal-bound in the centre while still in the bud stage, and unable to open, are, unhappily, common in town gardens after the first year or two of their existence. Roses are not town plants, and dislike an impure, fog-and-acid-laden atmosphere. The townsman should not run the risk of almost certain failure by growing a large number of Roses, but should carefully choose a few; then, with good culture, he may achieve successful results.