G,day Dave I have always used, Phostrogen and MiracleGro for Azalea and Camellias. Fortnightly at the makers recommended strength.
Phostrogen I believe is hard to find now, so I recommend Yates fruit and flower it has the same NPK as Phostrogen. I use one, one fortnight and the other the next.
I do not use MiracleGro on Ficus as it is high in Nitrogen, and we want small leaves on Ficus don't we. I hope this helps.
Too much Dynamic Lifter will send the soil Alkaline, our natives prefer an acid to neutral soil. I use both of these products on the proteaceae, that I grow. Adenanthos and Banksia. Phostrogen has 4.5 and MiracleGro has 1.2 so both are low in Phosphate.
Cheers

Pup
edit typo