I was just introduced to Kang Kong/Kangkung/Chinese water spinach (Ipomoea aquatica), and was wondering when it's too late to start growing Kang Kong.
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2Are you allowed to in your area? In some places it's considered a noxious weed. – Graham Chiu Jul 18 '16 at 05:16
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Too late where you are (from memory, you're in USDA zone 4, pretty much). Start off in early spring from seed, best grown in wide containers, but can be grown in the ground. In tropical and sub tropical areas, it can be harvested year round, will be more of a summer annual where you are
http://balconygardenweb.com/how-to-grow-kangkong-growing-water-spinach/
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http://www.dnr.state.mn.us/invasives/report_aquaticplant.html so for Minnesota, this plant is not yet in the waterways – Graham Chiu Jul 19 '16 at 00:45
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It's only invasive if it gets out of control, like planted in a wild location, I would plant it in a metal tub, or a bathtub to produce spinach all year long. – black thumb Jul 19 '16 at 05:13