Good old compost, an acidifying fertilizer (I like Hollytone very much) and
sufficient moisture will work wonders.

Dave

"Mceezee" wrote in message
...

The azalea bushes I have are about 15 yrs old (they were put in when we
had the
house built). They have gotten very big (we have trimmed them back some
over
the years).

They just don't seem to be full and full of flowers like they were when
they
were the first couple of years. Is there anything I can use on them now
to
help them get "fuller". I would say our soil is kind of hard where they
are
planted but we do mulch around the plants.