Soil for my first Grow

3.5L tall pots with biobizz lightmix first 4 weeks. 20L repot to plagron batmix. Only advice i have is avoid biobizz nutes, havent had yellow/fert problems since i moved to cheaper plagron natural line.

All mix is already ammended with nutrients. Together with compost it will be a bit too strong if you want to start seedlings in it. Other than that the mixture is fine id say. Check the trainage - depending on your compost you might want to add another 10-30%

more soilless vs soil. I would have added more organic matter like compost or castings with the humus. and I would still add in more perlite. Coir and allmix are like the same thing. peat vs coir. I aim for around 20-30% perlite or alternative, 30% compost and alike and then 40% filler like coir or peat. I then add in dry amendments as well to make up the difference and give the microbes food to munch on. Good Luck!

All mix has perlite in it ;) I would not add coco , but generally not a bad

I'd also include something that promotes aeration and drainage like perlite. Use about 20-30% of your total mixture.