Black Eyed Susans Hardiness
by Terry
(Battleboro NC )
Do they multiply, will they come back every season?
Doug says that there are multiple articles and comments on this page about this plant but the specific answer to this question is that "it depends". :-)
It depends on the variety you're planting. Some are annuals, some biennial (flower second year and die) and others are bone-hardy perennials. So - tell me which you've planted and I'll tell you what your chances are that they'll return next year in NC. The odds are that all but the annuals will.
Do they multiply. Yes. If you let them set seed and the birds/ants don't get the seed. You can save your own seed and sow it yourself next spring just in case you might have annuals. You'll know when you see the older plants popping up which you have (or conversely if they're all dead - you know as well) :-)
But it really does depend on what you're growing whether they're going to come back for you.
In NC, you're going to find most will come back. Here in Canada, we need the tougher ones.
Hope that helps.
