Bit wet in S MB

[shtferbrains]

When you say July1 for 70% of the grass , do you have any Meadow Brome or Legumes that you count in that?

When we had Dehy plants here they used to make great effort to get first cut off by July 20 in order to get a good yield on the higher value 2nd and third cut

[grassfarmer]

We have some meadow brome here and some high proportion alfalfa pastures. Sure the alfalfa produces through a longer season. It's basic plant physiology though - the grass plants want to grow, then form a seed head then quit growing leaves/stem for the year as their job is done - same as a cereal crop. Grasses like smooth brome can get that done well before the longest day so later season growth is limited.