RC bigrock was developed from CIR thru years and years of breeding cycles. It is significantly easier to establish. The seedlings have far more vigor. Seed size is 30% bigger. You have far more room for error on planting depth. The concept of stratification is out the window. It simple doesn't apply to RC bigrock. You can plant it like any other crop field. It does get taller than CIR which can be helpful in screening applications. The price difference between RC and CIR is minimal. I won't ever plant CIR again.Why do you say not to plant Cave in Rock? I have about 6 acres that I planted throughout the years, and it has worked great.