I am interested in the following seeds you have: Ipomoea ÂMorning Glory ÂHeavenly blue x Dark Purple mix Clitoria ternatea  Blue Pea Vine Marigold Scarlet Starlet I have a white ROS w rose eye, and a lavender/pink one that has a sort of burgundy or rose eye.Check my list.

I live in Zone in Canada and honestly almost anything grows here . I think your area might be the issue not the plants . I have never had powdery mildew on even my roses so not sure what the issue is where are planting. I have yews in a very sunny dry area in my yard and they are growing really well this is the 3rd year . I bought them in 1 gal pots about 15" tall they are now 3 ' tall and very strong and healthy . I planted them 30" apart to form a hedge in the next 3 yrs . Maybe ask why the plants are on such a big discount usually perennials are just potted on in plant nurseries . I would speak to a nursery owner to get some real advice as to what they for you actual growing spot. I would also maybe get the soil tested just to make sure .My nderstanding is that even the dwarf ROS gets 6' tall and 4.5 feet wide Is tha what will work where you plan them. I always plant as if the plant is full grown and have good luck. We live on 14 acre in Creston with a row of overgrown cedars that some one planted every 12" and staggered we have now spent the last 3 yrs having trees removed and topped to give them some breathing space ..

It can be very aggressive, but as gadengal says, technically it isn't an invasive. By definition, an invasive is an introduced species from outside of the native ecosystem. That doesn't prevent some natives from being downright nasty in the right (wrong!) situation. But I've managed to kill a quite extensive, purposely planted patch of Oenothera speciosa with kindness. They DON'T need extra water or fertilizer. They will grow lushly, bloom like freaks of nature, and promptly... die. They prefer good drainage and a lean soil, which my red clay substrate doesn't supply.

Katob...Thanks for sharing your personal experiences with the Rose of Sharon seedlings I love learning about plants from actual gardeners, and it's always so magical to grow a seed and see what it becomes, and I had no idea what a wild card Rose of Sharon seedlings were until now, learning from others here on this garden forum. And yes! I'd love to see your photos for sure, I hope you can find them to share here. Also thanks for your observations on the invasion of the Pyrus calleryana tree seedlings in North Eastern PA, this is all so new to me, because in Pittsburgh (and we do have woodlands and parks even though I'm in a city neighborhood) I've never seen seedlings grow (since 1984). I realize I seem a bit dense (and even described as arrogant as I humbly try to understand the details) but I'm just asking questions and trying to understand why the ban is being described as being only on the Bradford Pear cultivar of the Callery Pear (Pyrus calleryana). So I kept googling and found a trusted source of info: The Culley Lab website https://culleylab.com/home-page/research/invasive-pears/callery-pear-cultivars/ The Culley Lab aexplains that the ban is actually on all of cultivars of the Callery Pear (Pyrus calleryana). and that over time people casually began to refer to the Pyrus Calleryana ban as the Bradford Pear Ban: "Pyrus calleryana (often indicated as just “Bradford pear”) began to appear on watch lists and invasive plant lists in several eastern and southern states." "So which cultivars are the cause? This is exactly what my lab has been studying. We have been conducting hand-pollinations between various cultivars and we also have a way to identify the parents of wild plants using their DNA. " And if I understand The Culley Lab, in studying the DNA of Pyrus calleryana seedlings - seems to indicate that it's seedlings are not like the parent plant....kind of like the Rose of Sharon seedlings are different colors. They also explain Starlings & American Robins eat the fruit and tend to eat the seeds and distribute them. https://culleylab.com/home-page/research/invasive-pears/ ....and more reading on a Harvard website written by the Culley Lab: "Why would a species commonly planted as a ornamental tree for decades without a problem suddenly begin to spread and become invasive? See our paper published in Arnoldia https://arboretum.harvard.edu/stories/the-rise-and-fall-of-the-ornamental-callery-pear-tree/ for the complete story, or just keep reading here." All very interesting info and history that all started with this guy, a plant hunter named Frank N. Meyer back around 1908. The Mysterious Life and Death of Frank Meyer, the Man Behind Meyer Lemons (and Callery Pear) https://www.vice.com/en/article/59je4d/the-mysterious-life-and-death-of-frank-meyer-the-man-behind-meyer-lemons