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Wirecage tomatoes do developWirecage tomatoes do develop a heavy foliage cover, but this is to reduce sunscald on fruits. However, it helps to space the plants somewhat further apart (3 feet) to allow good air circulation between plants. We would not prune the leaves, but would limit the suckers (new shoots) weekly. Pinch shoots off with your fingers.

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