i would assume youd have to start growing what you want to cross the LR with in advance of starting th LR itself. im making an ass out of U and me because the LR doesnt take as long to flower as non-ruderalis correct? im just curious to kind of see a time table. and would you be wanting the LR to be male, or the non-ruderalis? or does it not matter once the pollens crossed?
if you are using male pollen from a plant you dont already pollen in reserve for, then yes, you need to start the other crop earlier. I already have pollen in reserve so this is not a problem. i dont really understand the last part of your question, so ill answer it the best i possibly can:
im mainly crossing pollen i already have with LR females. I will be saving some LR pollen for use later, to do some experimenting. but here's how my first batch is going: (keep in mind my names arent very original until the end product)
white satin x lowryder2 = whiteryder
ice x lowryder2 = iceryder
whiteryder x iceryder = subzero
im going for a small frosty white atuoflowerer. i think this will please many. ICE is very high yielding and very frosty. white satin is also high yielding, very very frosty and very easy to grow. im going to carry over a milky white, easy to grow, autoflowerer for my "SubZero" cross. my first few batches there will be several that are not autoflowering, i will weed those out. once i have the traits and autoflowering tied down, i will do a few inbreds to get a stable IBL. only the best is coming out of this project. if i need to get into heterozygous and homozygous attributes and how all that works i will, but for right now im trying to keep things in layman's terms.