Recommended Spacing: 2 ft apart recommended for a solid screen, wall, or border planting. Widen spacing to 4 ft or so if you want a clean break, or slight gap from one tree to the next.
Diseases / Insects: Aside from an occasional bagworm here or there....the only main threats to Italian Cypress would cankers caused by either Seridium cardinale or Diplodea pinea. And either of the problems are extremely rare - but have been observed in areas with very high year round humidity.
Fertilization / Feeding: For maximum health & hardiness, we highly recommend POOPeas for use with all of evergreen species. However, either water soluble ( Miracle Gro, or equivalent ), or granular fertilizers ( Holly Tone is excellent ) are also good options. Most any granular fertilizers with a 6-12-12, or 10-10-10 ratio are also acceptable. Best to fertilize in early spring, and again in mid fall - avoid feeding standard chemical fertilizers during hot summer months, and directly after transplanting. POOPeas may be used at anytime.