Answer: Silver Lace Vine (Polygonum aubertii) can grow vigorously enough to cover 100 square feet in a single season. In your gardening region it will be deciduous rather than evergreen, and you can cut it back to the ground in the spring, which will delay the bloom until August. (Generally the plant blooms late spring to autumn.) Because it's such a rapid grower, it can get out of control if not regularly maintained.
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