Trimac Outdoor Jacksonville & Orlando Landscaping tips. Just want to update everyone on our treatment schedule. We applied winterizer fertilizers to all of our treatment clients in late november early december this year due to the mild winter. So everyone is clear, winterizers will not green the lawn, however what it will do is create a strong root base to take on the freezes that winter time may bring. This winterization process allows the treated turf to come back strong in the Spring.