Those strange "sticks" on your mandevilla are seed pods—long, paired follicles that split open when mature to reveal seeds with silky, parachute-like tails.
Allow pods to dry on the plant until brown and splitting. Collect the seeds and store them cool and dry over winter. Each seed's fluffy coma aids wind dispersal in nature.
Plant seeds outdoors in May after soil warms. Provide a trellis for the vigorous vines. Seed-grown plants may vary from the parent, offering potential for new flower colors or forms.
It's a fun, free way to expand your mandevilla collection or share with fellow gardeners.
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