I only know the new ways of adding nutrients. @Bill284 may know a remedy or two - but the nutrients that are available now are pretty awesome
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StonedCrumpet
Bill284
Hey SC. 
There are a lot of factors to creating big buds.
Genetics, environment heat rh, light energy and nutrition.etc...
There are pk boosters but unless you have everything else going great, adding something to the soil now won't make a huge difference.
I find autos hit or miss.
You either get decent buds or pine cones.
But everything I mean everything has to be perfect, or autos don't fulfill their potential.
Hope your enjoying your weekend.
There are a lot of factors to creating big buds.
Genetics, environment heat rh, light energy and nutrition.etc...
There are pk boosters but unless you have everything else going great, adding something to the soil now won't make a huge difference.
I find autos hit or miss.
You either get decent buds or pine cones.
But everything I mean everything has to be perfect, or autos don't fulfill their potential.
Hope your enjoying your weekend.
Doctor Trevor
What are you currently feeding her?