Tables:

Hazardous Oils

Basil: Never use!
Bergamot: Phototoxic
Clary Sage: causes alcohol to be very effective
Bitter Fennel: epileptic attacks
Hyssop: epileptic attacks, do not use if pregnant
Marjoram: do not use if pregnant
Mugwort: Never use!
Myrrh: do not use if pregnant
Pennyroyal: do not use if pregnant
Peppermint: not recommended for pregnancy, use wintergreen
Rue: Never use!
Sage: toxic epileptic, not for use for high blood pressure
Thyme: Never use!

Zodiac

Aries: Black Pepper, clove, coriander, cumin, frankincense, ginger, neroli, pettigrain, pine, woodruff
Taurus: Cardamon, oakmoss, patchouli, rose, tonka, ylang-ylang
Gemini: benzoin, bergamot, caraway, dill, lavender,  lemongrass, peppermint
Cancer: Chamomile, cardamom, jasmine, lemon, peppermint
Leo: bay, cinnamon, frankincense, ginger, juniper, neroli, orange, rosemary
Virgo: clary sage, cypress, fennel, dill, lemon balm, oakmoss, patchouli
Libra: Chamomile, dill, eucalyptus, fennel, geranium, peppermint, spearmint, palma rosa
Scorpio: Black Pepper, pine, tuberose,
Sagittarius: Bergamot, clove, lemon balm, oakmoss, rosemary
Capricorn: Cypress, myrrh, patchouli, vetivert
Aquarius: lavender, patchouli, pine, anise
Pisces: camphor, cardamom, jasmine, myrrh, palma rosa, sandalwood, ylang-ylang