This tip just came from Orchard Nursery in Lafayette - a World Class Nursery. Incredibly knowledgable staff, great selection of basics and really unusual plants (check out the 4 inch section for the most mouth-watering perennials!) with great displays to inspire new plant combinations and new cravings. Come with your car empty - it will be full when you leave. And! they have great classes. A petting zoo in fall, a winter wonderland during the holidays. What more could you ask for?
For Sweeter Oranges:
Fertilize in late summer, fall and winter with Master Nursery Master Bloom or Garden Elements Ultra Bloom. These fertilizers are formulated without nitrogen to aid in the development of flowers and fruits, and they also help plants resist disease and cold weather damage. High potassium is very important in increasing sugar levels in citrus (especially oranges and tangerines) and studies have shown that high potassium levels in the soil improve yield, color, size and quality of the fruit. Apply once a month from late summer to spring and taste the difference in your next crop.