You can feed your plants molasses all throughout the growing season, I feed my whole back garden 1 teaspoon in a bucket of water every second fertilizing, so once a month or every 3 weeks.
You can also foliar feed it, just make sure it's unrefined Molasses, and mix it in boiling water in a cup or bowl before adding to the bucket of water to destroy the stickiness, first.
Edit: the 'recommended' dose is 1 tablesppon per gallon I believe, but I do a teaspoon in 2 gallons to be on the safe side.