Compare 5 Common Potting Mixes available from Bunnings in Melbourne

I have noticed a big difference in some of the potting mix bags I have been buying so I thought I would do a test on 5 commonly available mixes. I have planted out 3 seeds in each pot to see how well they grow in my greenhouse so as similar conditions for each pot as possible. Scotts Osmocote Premium $12.13 Scotts Performance Naturals $13.28 Seasol Advanced $7.11 Garden Basics Tomato and Veg $4.54 RichGro Black Marvel $10.11 Please keep in mind that this test is specific for my greenhouse and conditions and may not reflect other environments. Seed Quality can also vary. I have tried to make the conditions as consistent as possible. I have received no sponsorship for this comparison.