There are recommendations on
mowing centipede that range from the low end (1.5) to the
higher end (3). Presumably anywhere in between these two
should work well. I dont recommend too low as this invites
centipede lawn. I have found that a 2 cut produces the best
looking lawn. Since centipede is a slow grower you do not need
to mow it as frequently as other lawns, so cutting it short
wont help much in terms of extending the amount of time
recommended that the lawn be core aerated once a year,
Centipede can be aerated anytime during the growing season but
it is important to allow for at least four weeks of growing
season so that the lawn can fill in the aeration holes before
dormancy sets in.
Recommendation on dethatching - If there is more then 1/2 of
thatch present (Thatch is the presence of dead leaves and
stems that build up on the surface of the soil). You should
power rake in the spring or fall.
Note - I generally dislike thatching for the simple reason
that it has a tendency to damage turf, this is especially true
for grasses that spread via rhizomes. My preference is to
aerate as aerating breaks up the thatch and helps it along in
the decomposition process.