What you use should take into consideration how you water them. Using a 5-1-1 mix with manual watering is just asking for poor results. It is for bottom self watering or maybe drip irrigation.
Also be careful with that lime, it is very likely the peat you buy is ph adjusted unless it specifically says it isn't.
A mixture of peat and compost and some perlite is a good mix for manual watering. UK people use compost only with jolly good results as well.
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