Titanium and aluminum are often used as colorants in tattoos; more worrisome, inks using nonmetal colorants may include traces of antimony, arsenic, beryllium, chromium, cobalt, lead, nickel, and selenium (AESI filed over the latter eight metals).
Apply about two ounces of a 5-10-5 fertilizer around each plant. Starting the second season and annually thereafter, fertilize raspberries in early spring before growth begins. Apply a balanced fertilizer, such as a 10-10-10, at a rate of 15 to 20 pounds of fertilizer per 1,000 square feet of planting. If using the hill system, apply about one-half cup per plant. Don't fertilize raspberries in late summer or early fall as it may force new growth that does not harden off properly for winter.
Raspberries need some afternoon shade if grown in hot climates, but in most regions, full sun is key to growing raspberries with rich, sweet flavor. Raspberries can produce for many years if grown in fertile, weed-free soil that drains well and has a pH of about 6.0.he most cold-tolerant varieties can survive Zone 3 winters, and fall-bearing raspberries can be grown in warm climates that have limited winter chilling. All types of raspberries â including summer reds, golden raspberries and super-nutritious black raspberries â make excellent boundary plantings in Zones 4 to 7.