My first attempt at growing anything edible - I have a Roma tomato plant bought at a nursery, still in same pot, on very sunny windowsill, watered every day. It has produced ONE fantastic tomato, it is very ripe and i will pull it off tomorrow.
Leaves, otoh, have gone mostly yellowy with black spots and then they just go brown and dry up. I haven't used any feed at all, should I be?
Will I get any more tomatoes? There were a few flowers but just the one tom!
It needs a bigger pot...small pot...small crop. (mines in a 18" circular pot on the patio in a sunny corner) (i'm assuming the nursery pot is one of the standard 4" pots?)
feed it with ANY general plant food if you have some...just to get it going...
the yellow leaves could be lack of water or too much water (ie pot sitting in water)... they like to be watered then drip out the excess through the bottom of the pot- they don't seem to like being wet constantly)
if it starts to grow...and you get flowers...each flower has the potential to become a tomato...if it is polinated...so to make sure this happens...gently touch each flower with a finger- spreading pollen from one flower to another... as my tomato plant is larger now...i blast it with the hose pipe quickly at night to do this pollinating thing!!!!