Each of these fish were about four months old. I used a 10-gallon tank filled about two-thirds of the way with water (because I wanted to use a BBS hatchery that requires that water level), with a divider that limited them to less than half of it. I put in Atison's Betta Spa, a heater set to 80, a hiding spot, some floating plants, and bubble wrap with an IAL on top of it. I left her in the jar for several hours, and when I let her out he was so extremely aggressive (constantly chasing and biting and not wooing) that I put her back in the jar and let her out later that night, when his bubble nest seemed complete and he seemed more interested in mating instead of fighting.
I let her out into the tank at 3 a.m. and checked on them occasionally the next day. I left the light on at all times. At 8:30 the following night, when I walked in, they had begun the process of spawning. Each time they wrapped, the male and female both gathered the eggs and put them in the nest. They continued until about 11:30. The female was dropping fewer eggs with each wrap at that point, and the male chased her away. I removed her to a jar.
In general, though, I would listen to the experts here rather than to what worked for me. I am new to this and have not yet raised fry, and this is my first successful spawn out of three attempts (the previous two of which were with another male).