Anatomy and supply. The thenar musculature consists of four muscles located on the radial side of the palm. Together they form the 'ball' of the thumb known as the thenar eminence. They originate at different carpal bones and distally attach to the thumb. The thenar muscles are: Abductor pollicis brevis muscle: arises from the tubercles of the scaphoid and trapezium, and from the flexor retinaculum.
Steps. 1  1. Choose the proper time to prune lemon trees. 2  2. Remove all fruit from the tree. 3  3. Prune any branches that are damaged or diseased all the way back to the base.  4. Cut any branches that are smaller than the diameter of a 1  pencil. 5. Prune suckers as they appear at any time.  6. Decide if you want an open, compact, or hedge type tree look.
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.