Answer: Both Sweet Broon and Mexican bird of paradise can be grown from seeds. I cannot find a seed source for you, however you may be able to glean some seeds from the plants you've found in your neighborhood. Be sure to ask permission before collecting seeds! Seed pods are ripe when they turn from green to crispy brown. Both plants are drought tolerant and easy to grow in a sunny site with good soil drainage. A general rule of thumb is to plant seeds twice as deep as they are wide. In this case, plant them about a half inch deep in moistened potting soil. They should germinate within 2 weeks.
Best wishes with your seed starting project!
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