Comparative Relative Maturity (CRM) is a standardised measure used to compare how long it takes different corn hybrids to reach physiological maturity – specifically, when the grain reaches black layer.
PAC 220IT has a CRM rating of 98 days*, which places it in the quick maturity category. This means it reaches maturity faster than mid or long season hybrids, making it a strong choice for shorter growing windows or where early harvest is preferred.
*Although CRM is expressed in “days”, it’s not a literal count of calendar days. Instead, it reflects a relative measure based on accumulated heat units (growing degree days or GDDs) under standardised conditions. So, a 98 CRM hybrid like PAC 220IT typically matures earlier than hybrids with higher CRM values, but the actual number of days to maturity can vary by environment.