Pomegranate: Reflect on Tikkunei Zohar, beginning of tikkun 24. The kavvanah is HVYH.
Citron: Reflect on Zohar 2, 120b. The kavvanah is HHYV.
Apple: Reflect on Zohar 3, 74a and 286b. The kavvanah is VHYH. Here everyone should drink a cup of wine that is mostly white with a little red in it. Their kavvanah is the Name of 63.87The name of 63 is YHVH spelled YVD HY VAV HY. This Name is associated with the World of Creation.
Walnut: Reflect on Zohar 2, 15b. The kavvanah is VHHY.
Chestnuts, Almonds or Hazelnuts: Reflect on Zohar 1, 161b, Secrets of the Torah. The kavvanah is VYHH.