I bought 4 tubers of Mirabilis jalapa (4 o’clock flower, marvel of Peru) at the Bloemenmarkt (flower market) in Amsterdam. I wasn’t expecting much from these plants, given that they are really for warm temperate regions and not the United Kingdom. To my surprise, they have taken well to the local conditions (even the miserable summer) we’ve had.
I’m not really sure what to do with these plants now that winter is soon approaching. The advice appears to be divided between leaving them in place with mulch and hope for the best year to digging the tubers up till the next year. Since I do have two in the ground and two in pots, I’ll probably try different methods and see which one works best! A proper scientific process!