Introduction. Costochondritis is the medical term for inflammation of the cartilage that joins your ribs to your breastbone (sternum). Cartilage is tough but flexible connective tissue found throughout the body, including in the joints between bones.It acts as a shock absorber, cushioning the joints.ostochondritis is the medical term for inflammation of the cartilage that joins your ribs to your breastbone (sternum). Cartilage is tough but flexible connective tissue found throughout the body, including in the joints between bones.
Fertilize citrus trees in the spring and summer. The ability of a citrus tree to use nutrients in fertilizer depends largely on whether or not it is growing in the proper soil. Citrus trees most often need nitrogen, although they may also be deficient in minor nutrients.
Nitrogen is essential for healthy lemon tree growth and production. Lemon trees (Citrus limon) grow outside in U.S. Department of Agriculture plant hardiness zones 9 through 12. These medium to large evergreen trees possess thorns, fragrant leaves and sweet-sour fruit. Citrus trees like lemons need fertilizing with nitrogen to produce strong growth each year. The best source of nitrogen for lemon trees is commercially available slow-release fertilizer.