Note: All beekeeping is local. Here in South Carolina we are able to use syrups both longer and sooner than those in more northern climates. Adjust your use of according to your climate.
I had some help stirring some syrup today! This time of year you want to feed close to the cluster yet not introduce too much moisture into the hive. A 2:1 sugar to water mix is best.
To get it close to the colony you an feed above the cluster via a bucket placed overhead on top of the frames or a similar setup with a jar through the inner cover hole.