okay, heres what I know about lady bugs. You can buy them more easily in the spring months, and the problem is they all usually fly away within a day or two. A solution to this is to use netting, to keep them from doing this... if you have aphids or a food source they will stick around and flourish, maybe even fornicate, ( I have witnessed but will not testify), they also like mountain Dew soda, dunno why, but if you have them under the netting and want to spoil them, thats a trade secret.
This concludes my knowledge of ladybugs.
Thank you.