Adonis:  myrrh, corn, rose, fennel, lettuce, white  heather
          Aesculapius: bay, mustard
          Ajax:  delphinium
          Anu:  tamarisk
          Apollo:   leek, hyacinth, heliotrope,  cornel, bay,  frankincense, date palm, cypress
          Attis:  pine, almond
          Ares:  buttercup
          Bacchus: grape, ivy, fig, beech, tamarisk
          Baldur:  St. John's wort, daisy
          Bran:  alder, all grains
          Cupid:  cypress, sugar, white violet, red rose
          Dagda:  oak
          Dianus:  fig
          Dionysus: fig,  apple, ivy, grape, pine,  corn,  pomegranate, toadstools, mushrooms, fennel, all  wild and cultivated trees
          Dis:  cypress
          Ea:  cedar
          Eros:  red rose
          Gwydion: ash
          Helios:  oak
          Horus:  horehound, lotus, persea
          Hypnos:  poppy
          Jove:  pine, cassia, houseleek, carnation, cypress
          Jupiter:  aloe, agrimony, sage, oak, mullein, acorn, beech, cypress, houseleek, date palm, violet, gorse, ox-eye daisy, vervain
          Kernunnos: heliotrope, bay, sunflower, oak, orange
          Kanaloa:  banana
          Mars:   ash, aloe, dogwood, buttercup, witch grass,  vervain
          Mercury:  cinnamon, mulberry, hazel, willow
          Mithras:   cypress, violet
          Neptune:  ash, bladderwrack, all seaweeds
          Odin:   mistletoe, elm, yew, oak
          Osiris:   acacia,  grape, ivy, tamarisk, cedar,  clover, date palm, all grains
          Pan:    fig, pine, reed, oak, fern, all meadow  flowers
          Pluto:    cypress, mint, pomegranate
          Poseidon: pine, ash, fig, bladderwrack, all  seaweeds
          Prometheus: fennel
          Ra:   acacia, frankincense, myrrh, olive
          Saturn:  fig, blackberry
          Sylvanus: pine
          Tammuz: wheat, pomegranate, all grains
          Thoth:  almond
          Thor:  thistle,  houseleek, vervain, hazel, ash,  birch, rowen, oak, pomegranate, burdock, beech
          Uranus:  ash
          Woden:  ash
          Zeus:  oak, olive, pine, aloe, parsley, sage,  wheat, fig
 
Offerings to the God:
All fiery and  airy  herbs  and  flowers  such  as  basil, chrysanthemum, snapdragon, clover,  lavender, pine;  strongly-scented, clean or  citrusy herbs and flowers; those ruled by Mars  or the Sun; yellow  or red  blooms such  as sunflower,  pine cones, seeds, cacti, thistles and stinging herbs; orange, heliotrope, cedar, and juniper.

~from Maat's Book of Shadows