In traditional Western lunar hair charts the waning moon is the focus for the goal of seeing slower growth after a cut or trim.
The waning moon is the light getting smaller, moving towards the New Moon again. The greatest strength of the wane is the week of Last Quarter right before the New Moon. Specifically, two days after Last Quarter day up until the day before the New Moon.
Aries, Gemini, Leo, Virgo, Sagittarius, Aquarius
For agreeable astrological signs, Leo comes in with the most votes from the experts on lunar hair care. Followed respectively by Sagittarius, Aries, Virgo, Gemini and Aquarius.
Let’s take a look at why these signs are better than others. What they all have in common is being barren or semi-barren. These terms are used also in lunar gardening. It is the time for maintenance when the moon is in a barren sign, not for planting which is saved for fertile times.
The other common factor is the class of dry. Leo, Sag, Aries are dry and also hot. Virgo is also dry, but cold. Gemini and Aquarius share the hot class.
Consider both the waning moon phase along with an astrological sign for best results for lunar hair care.
–Excerpt from Lunar Hair, “Lunar Hair Style Descriptions.”