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The ants are probably thereThe ants are probably there because of the aphids. They shouldn't be a problem but you can blast some insecticidal soap spray to get rid of the aphids and the ants will move on. As long as you are not using chemicals, just wash off your harvest and it is safe to eat.

2015 Special Edition Garden GuideCooking Fresh with The Old Farmer's AlmanacThe Almanac Monthly Digital MagazineWhat the heck is a Garden Hod?