do not have a PPM meter
 

Hi Ron I live in Mpls MN and have a flood and drain system in my basement. I am growing
cucumbers and I would like to know how what I need to do for pollination. I also am growing
tomatoes and the leaves are curling down could this be caused from to much nutrients in my solution.
I am watering 10 min. on 10 min.off. I do not have a PPM meter I use 3 teaspoons of Dyna Grow
per gal. of water. Other than the curling leaves my tomato plants look great and my cucumber plants
that grown in the same system look good execpt the edge of the cucumber leaves are yellow. Thanks
for any help you could give me Walt

Yes I would say to high of ppm. I would cut it in half and watch for better results and don't forget to
keep your pH between 5.4 to 6.8.
Ron