Tomatoes not doing well
This is my first time trying to grow tomatoes, so don't know if my expectations are off or if I'm doing things wrong.
I have a 'Better Boy" (?) planted in a ~7 gallon self watering container. The potting mix is an organic mix by miracle grow, fresh out of the bag. The tomato came in one of those peat pots that you leave on the plant (but take the bottom out of before planting).
It started off well when I took advantage of the warm march weather but then the plant really slowed growth and the leaves are all turning yellow and look like they're dying.
There are two tomatoes growing on it - would they be sucking up too much energy / nutrients from too small a plant?
I didn't add any fertilizer to the potting mix (as it is supposed to have some in it to start with) but have since added some organic solid tomato fertilizer. Could the plant have just not been getting enough nutrients, so the leaves turned yellow?
Should I nix the two tomatoes currently growing? Restart with a new plant?
Any help would be greatly appreciated.