Blueberries are traditionally grown in northern climates with cold winters, but horticulturalists have developed varieties for warmer climates. To create a variety suitable for warm climates, the standard highbush blueberry Vaccinium corymbosum , hardy in USDA zones 3 through 7, is crossed with the southern wild variety rabbiteye V. This results in a variety of southern highbush blueberry species Vaccinium virgatum, Vaccinium corymbosum, and Vaccinium darrowi that grow in USDA zones 5 through Eulalia Palomo has been a professional writer since Prior to taking up writing full time she has worked as a landscape artist and organic gardener.
Palomo holds a Bachelor of Arts in liberal studies from Boston University. She travels widely and has spent over six years living abroad. By Eulalia Palomo Updated December 14, Related Articles. Nitrogen deficiencies are common in blueberries. Note the light green color chlorosis is uniform across the leaves with no particular pattern or mottling.
Other symptoms of nitrogen deficiency include reduced shoot growth, numbers of new canes and yield. Nitrogen deficient leaves may develop early fall color and then drop off. Plant on the left did not receive adequate nitrogen fertilizer. More blueberry nutrient deficiency information. Interveinal yellowing is caused by iron deficiency , but is symptomatic of high soil pH. Iron deficiency symptoms develop first in young leaves. Lowering the pH with sulfur will usually correct the problem.
A number of causes can induce leaf browning in blueberries. Many of these are associated with factors contributing to overall cane death or dieback. If canes are not dying but leaves on particular portions of the plant are turning brown, the cause could be.
Herbicide injury from preemergent materials is usually accompanied by leaf yellowing or bleaching, followed by browning, and tends to be interveinal. More herbicide injury information. Botrytis Stem and Leaf Blight — This fungus affects leaves and shoots during damp, cool springs. More botrytis blight and fruit rot information. Mummy Berry Shoot Blight — Leaves become necrotic and are covered with powdery masses of gray spores during wet weather. More mummy berry information.
These primary shoot blight infections occur when spores are rain splashed and wind carried from mushrooms cups developing from mummfied fruit on the ground under bushes.
Mummified blueberry and fruiting bodies of mummy berry fungus. Potassium Deficiency — K deficiency results in marginal leaf burn. It is not common, but has been observed in very sandy soils. Potassium deficiency in blueberry with characteristic marginal leaf burn.
Overfertilization — Overfertilization also causes marginal leaf burn. In young plants, too much fertilizer can lead to death. Fruits from all of these plants are edible by humans. The most widely dispersed and easily recognizable of this category of shrubs are the highbush and lowbush blueberries.
Vaccinium corymbosum, or highbush blueberry, is the most recognizable variety, as it and many of its cultivars are widely available for purchase in commercial nurseries, and the fruits are sold by the pint in grocery stores. On the twig, leaves grow alternately, or spaced out along the branch.
The margins of the leaf are smooth and not serrated. In the fall, the leaves of the highbush blueberry turn a fiery red, which make the shrub stand out where it grows as an understory plant in boggy pine forests. In the springtime, white, bell-shaped flowers appear which eventually turn into clusters of dark blue fruits, each of which are between 5 and 10 millimeters across.
As its name implies, the lowbush blueberry, or Vaccinium angustifolium, is the much shorter relative of the highbush, growing to only 2 feet where its cousin can reach 15 feet in height.
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