Timing of fall planting: a critical decision
In central California, water is often times the limiting factor in deciding when to plant winter crops. Without irrigation it becomes necessary to wait for the first rains to add moisture to the soil in preparation for successful seedling germination.
Rainfall isn't the only factor to take into account, however, and revolving a planting schedule solely around the first rain forecast could have serious consequences down the road.
If the first storm sequence hits in early fall before temperatures have dropped significantly, there's the risk of a rapid growth response due to the burst of moisture and heavy sunlight. If the moisture doesn't continue, the young, shallow roots could dry up, limiting future access to groundwater and inhibiting growth as a result.
The most acceptable time for planting small grains and forage mixes in the southern San Joaquin Valley falls between October and November, extending as early as September or late as December depending on that season's weather conditions. Keeping an eye on both water and temperature levels is critical, with seed ready and a planting practice established well in advance to take advantage of the most opportune windows as they appear.
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