Soil mix:
25 litres of compost
27 litres homemade worm castings
8 Cups Perlite
8 Cups Vermiculite
2 Tbsp Seaweed extract 3-4-1
2 Tbsp Bat guano 3-10-1
2 Tbsp Rose food 5-6-12
2 Tbsp Blood, fish and bone 5-5-6
1 Tbsp Mychorazae
1 Tbsp Powdered egg shells
I made the soil batch above 1 month before using it. I watered it with aerated compost tea that had been brewing for 24 hours (4 litres rain water, 25g worm castings, 25g compost, 25 ml molasses) and left it.