I agree wholeheartedly Lois. As a maintenance gardener that makes a living doing weeding and planting, I have come to despise Rudbeckia. Every time someone wants me to plant these I cringe. Little do they know that soon they will be poking up everywhere lending to a general sense of disorder and messiness in their garden. Once you have them it seems like you cannot get rid of them either. One client has been trying to get them out of her garden for years now. I keep digging them up, but somehow the little buggers keep escaping to rule another day!
I bought the 'Goldstrum' myself and love their late blooming habit. I have noticed the spreading tendencies and have started digging early in the spring those I don't want. But I wouldn't get rid of all of them, I love them. They love our hot summers here and thrive, sometimes there is not much that does!
While they may spread for some, others like me do not have a problem. Mine stay put, I can't call them invasive in my garden. They are a lovely addition, put out if I am lucky a few seedlings which do go in another garden. I have found though that the plants do get massive over time and will need a normal dividing soon.
I have noticed that whatever BigBox Store has in abundance, if I buy it, I will have it an overabundance before too long myself. That part is a very good point. (Not that your neighbor is a BigBox Store, but ... you know.) xx, Carrie
When I planted my Goldstrum, I cut a large hole in the landscape fabric and planted it in the center. The entire bed was done this way, because some of its bed companions are dotted mint, bergamont, and queen of the prairie. I think it would be a major wrestling match out there if I hadn't enforced some boundaries.
I must say that the birds love this bed because the entire thing is enclosed by a 6 foot chain link fence. We call it the DMZ (demilitarized zone). We created it because our dogs and the neighbor's dogs fought constantly through the single fence. So we placed a second fence on the inside with a space of 5 feet between them. No more dog fights and a nice safe haven for the birds.
Oh my, some of the seeds I "obtained" at work are Rudbeckia. I have them only in containers right now. Our winters are so mild, perhaps they should stay in containers? I'd love to see some Florida experience on this one.
Sigh . . . we finally planted some black-eyed Susan . . . I couldn't remember EXACTLY why I had hesitations . . now I remember . . . and now it is all over my yard! Oh well, it can fight it out with the coreopsis 'Moonbeam'!