Crab apple trees with leaves now turning orange and dropping off suffer from a disease called apple scab.
Spraying becomes unfeasible on large trees.
Consider replacing old crab apple cultivars severely affected by scab with newer, resistant varieties, says the Maryland Home & Garden Information Center.
Remove fading rose blossoms to promote a new flush of buds.
Water roses during dry spells, but avoid getting leaves wet, especially in the evening.
Use a granular, slow-release fertilizer formulated for roses.
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