When chilled water HVAC is used in cold climates, it can be used for "indirect" economization.
Airside economization is often used during cooler weather by using outside air directly for cooling. However, because CO2 is enriched in grow rooms to increase plant growth from about 400 ppm outdoors to over 1000 ppm in flower rooms, outside air economization is typically avoided because it would blow away the enriched CO2.
Using chilled water systems, the chilled water (containing glycol) can be run through a "dry cooler" (sometimes called fluid cooler) which is just a water to air heat exchanger. Here, the chilled water is cooled by the outside air, providing cooling (and dehumidification to varying degrees) to the grow rooms, without running the chiller and without bringing outside air into the grow rooms directly.
I would always recommend looking into waterside economization if you are planning a grow facility with a chilled water system in a cold climate.
To estimate the effectiveness of using adding a dry cooler, you (or we) can look at the average number of hours below the outside air temperature the dry cooler needs to cool the chilled water to the design temperature. The higher the chilled water temperature used in the system, the more hours of economization will be availble in a given location.