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Question

If I plant seeds from my 4 o’clocks, will they eventually turn into tubers and how long will that take?
Thank you.

Answer 1

Four o'clocks reseed themselves liberally, so if you want to gather seeds and plant them, that should work. The tubers develop over the course of a summer, to help the plants through the winter. Here are a couple of articles that could give you some food for thought: https://www.gardeningknowhow.com/ornamental/flowers/four-oclocks/four-oclock-plants.htm
https://www.gardeningknowhow.com/edible/vegetables/vgen/preseeding-vegetables.htm