I have this bird seed that is shelled sunflower seeds. The person at the bird store said it won't sprout which will benefit me since i live in an apartment. I guess some of it fell into my tomato container in this past wind storm and when I added some new soil on top of my plants, they started to grow. Now I have some fully grown tomato plants producing fruit and a few sprouts of sunflower. Should I go ahead and pick off the sunflower sprouts? Will it do any harm to my tomatoes? Or should i leave them?