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You should wait at least two years after the drought conditions are over before you order from a nursery that carries roses from California growers. The nurseries are required to order their roses two years in advance.
The roses that Rosemania is carrying this year, were budded in the fields two years ago. You know what the drought conditions were back then. The same kind of timing will be true going forward. So, even if the drought conditions were over this year, and that won't happen, you would be wise to wait another two seasons before ordering roses from these nurseries.
Not all of Weeks roses are being grown in SOCAL, but the odds are high that any nursery in California would receive inventory from SOCAL growers.