cold hardy South African winter growers?

Nicholas plummer
Sat, 17 Dec 2016 06:49:42 PST
The Moraea polystachya planted in my garden has been blooming all autumn,
despite several frosts.  I'm not sure if it will flower again after several
nights in the mid 20s and a low of 20 F (-6.5 C) on Friday morning, but the
foliage still looks good.  This is its third winter planted in the ground.

Are there other South African winter growers that exhibit similar hardiness
and would be worth trying here in Zone 7b?  Ideally, they'd be plants that
bloom closer to the beginning of the growing season, so I'd be more certain
of getting flowers before a hard freeze.

Any suggestions?

Nick Plummer
Durham, North Carolina, Zone 7

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