For some reason I haven’t put “working braids” in the mare’s mane recently, and it’s showing… She has a section of much shorter mane, a few inches in front of her withers, and it’s making a show-shape running braid impossible. Must fix this.
Anyway, last year and the year before, when the weather was above freezing (arthritic hands really can’t handle braiding when it’s cold…), I’d put her up in 8 to 10 “pigtails”, braiding yarn into each one. I could leave them in for a week to 10 days, then I’d take them out, let the mane rest for a day, and rebraid. The resting is not necessary.
Also would only wash the mane a day or two before showing or if it was really grubby. I tried to leave it alone as much as possible. A slightly dirty mane holds a braid better than a clean mane, I’ve found.