Gordon Johnson, Extension Vegetable & Fruit Specialist; gcjohn@udel.edu Plantings for late summer and fall harvested vegetables will be underway in the next few weeks. Timing these plantings can be a challenge, especially where multiple harvests are needed. Plantings from early… Continue Reading
Gordon Johnson, Extension Vegetable & Fruit Specialist; gcjohn@udel.edu High temperatures (90°F or higher) coupled with clear skies can lead to heat buildup on the surface of black plastic mulched soils. We have found temperatures of over 140°F at the surface… Continue Reading
Gordon Johnson, Extension Vegetable & Fruit Specialist; gcjohn@udel.edu Bolting is the term used for flower stalk formation in vegetables. Bolting response may be related to temperature, daylength, or a combination. Bolting in spinach, lettuce, and some radishes (oriental types) will… Continue Reading
Gordon Johnson, Extension Vegetable & Fruit Specialist; gcjohn@udel.edu Pea planting has progressed significantly this week and potato planting is well underway. Timing of spring-planted vegetables will depend on soil conditions, soil temperatures, and long-term weather forecasts. We currently are in… Continue Reading
Gordon Johnson, Extension Vegetable & Fruit Specialist; gcjohn@udel.edu Calcium Deficiency Calcium deficiency is most commonly seen as tipburn of cauliflower, cabbage, and Brussels sprouts. Chinese cabbage (Napa cabbage) is also susceptible to tipburn. This problem can cause severe economic losses.… Continue Reading
