By Mbaichtal
United States 
I used a pre emergent in my vegetable garden and ever since my garden will not produce vegetables and the plants are stunted. Although the product said it was safe for the garden Im wondering if this is the problem.
30 Jun, 2013
Answers
I used a granule (Preen) between the plants after they were growing, so it sounds like that is not the problem.
1 Jul, 2013
did you use the correct application rate? the chemicals in excess would affect subsequent growth.
1 Jul, 2013
pre emergent sprays stop seeds germinating. so if you planted veg seeds then that is why they failed. These sprays tend to be used on bare ground in between established herbaceous plants, preventing weed seed germination. the spray coats the seed preventing water imbibition, so the seed cant germinate. as for the stunted plants I don't know.
30 Jun, 2013