Usual disclaimer: All beekeeping is local. The following is based on my experience in the Midlands of South Carolina.
Monitor for queen cells – check suspect hives every 7 days for swarm cells hanging under upper boxes in hives with screen bottom boards and all boxes in hives with solid bottom boards.
Control swarming. Capture swarms. Begin IPM program.
Beginning of nectar flow in earnest. Plan on checking every two weeks for hive body management.
Second and additional super(s) placed beginning of this month.
Install and feed any packages purchased. Feed splits. Feed captured swarms.
Unite weak colonies with strong colonies unless suspect of disease.
Do splits if at all possible if queens available (order queens when club orders packages). No longer time for colony to re-queen self in time to raise foraging bees for flow. Failure to make splits may lead to trouble with congested hive, queen cell building, etc. If needed, split any hives not previously split and re-queen any weak queens. Queens should now be available if needed.
Place beetle traps or other hive beetle management items.
Watch for swarms.
Notice Dogwood blooming, Azaleas in earnest first week.
1)Install supers on all hives. On strong hives, install multiple supers if frames have drawn comb. Weak or medium hives should receive less supers accordingly. Periodic checks should be made during the honey flow to see if additional supers are needed.
2) If not already done, Swarm Traps should be in position at various points 360 degrees surrounding apiary. Place traps at 50yds. to 150 yards away from colonies, edges of open fields, close to “bee” landmarks, scent with lemongrass oil, 1 1/4″ entrance.
April 1st – April 30th
1) install package bees if not done so already feeding them 1:1 sugar syrup
2) check colonies to see if additional empty supers are needed on strong colonies
3) replace weak queens
4) watch for swarms and capture, if possible
5) place beetle traps in colonies, if you see lots of beetles (> 20 beetles)