TFF Fertilizer question in container... Is is too soon?

[squirrel789]

Hello,

I planted some indeterminate plants about a week ago, planting them about 14" deep vertically in a large 170 container (Water trough 2'W x 2'D x 6'L with many holes in the bottom). The tops sticking out have been growing, but not much yet with the cool weather, and are now about a foot tall - some a bit less. The thing is, they are already developing flowers near the bottom.

I have a balanced 20-20-20 water soluble I can use and I just got my Texas Tomato Food I ordered. Since the plants are still are so short but are flowering, does anyone have a suggestion as to whether I can start them on the TFF now, or should I give them higher nitrogen fert for more growth first?

The mix is roughly 2 parts good compost, 2 parts peat, 1 part vermiculite, well mixed and topped with large pine chunk mulch. I know there should be some nitrogen from the compost, but I am reading that containers are different and the nutrients drain out quickly with watering.

Thanks for any advice for this first-time container gardener!