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I have a couple of pots of the purple gomphrena that have done exceptionally well in our severe summer heat, so I'd like to save some seed. (There are quite a few flowers on them right now, but they don't look as large as the ones during the summer. I pruned the plants in August.) We've had a light freeze, but the plants are alive, although barely. Our first hard freeze could come as late as New Year's. I'm wondering if it would be safe to harvest the flowers I want to keep for seed now, or should I leave them on the plants until the plants are completely dead? And when I harvest them, do I just let them dry out naturally for a few weeks and then separate the seed to save for spring? Should I store them in the refrigerator, or will they be all right at room temperature?
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