UK - Greenhouse Bing Bang Auto flower - Day 25

Hello! I'm a bit of a newbie grower, as this is only my second grow, but I have decided to do a greenhouse grow this year (I live in the UK). My plant is 3 weeks and 4 days old, since it sprouted (25 days old), and I am growing it in a medium sized pot, with some home compost, mixed with some home decomposed horse manure. I am feeding it a very small amount of tomato food every two weeks, and sometimes some baby bio. I am boiling up the water in the kettle and letting it cool before I water it, as I want to boil off most of the chlorine. Tell me what you think.. (Feedback and critics)

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You are going to need to pot them on into bigger pots. Not yet though. Also, tomato food doesn't usually have enough nitrogen for veg growth. The manure and compost may compensate for this though.