I noticed today that 3 out of about 10 main foliage stems have collapsed, pulling on them shows that they have detached and are blacked at the base. Other stems also look like they are wilting a bit. Weather has been sufficiently moist, and not overly hot, but it looks like the whole thing is rotting. Any suggestions? Thank goodness I have a whole crop of seedlings coming along, as I fear this plant is on its way out for some reason.