Scott Korcz from Williamson County, Texas wrote with these photos inquiring about the advisability of treating peach and plum trees in late summer for iron chlorosis. In many of our high pH soils, iron may be present, but the high soil pH makes it chemically unavailable to the plants. Treating with simple elemental iron as some use on lawns do little good because the iron is immediately tied up. The use of a chelated iron product overcomes that restriction and allows symptomatic plants to take up iron and re-green the affected tissue
Its important to keep fruit tree foliage as long as possible going into the fall. Late season photosynthesis is important to keep trees loaded with carbohydrates going into winter. These stored carbohydrates are important for fall and winter root growth, optimal winter hardiness and to get trees off to a good start the following spring.