Hi bee...I grow ornamental grasses from seed. In the past 2 years, using winter sowing techniques, I grew these: Anthoxanthum odoratum.. Sweet Vernal Grass Briza maxima.. Annual Quaking Grass Briza media.. Quaking Grass Carex grayi.. Gray's Sedge Carex muskingumensis.. Palm Sedge Chasmanthium latifolium.. Northern Sea Oats Cortaderia selloana.. Pampas Grass Deschampsia cespitosa.. Tufted Hairgrass Eragrostis spectabilis.. Purple Love Grass Festuca gigantea.. Giant Fescue Festuca glauca.. Blue Fescue Festuca mairei.. Maire's Fescue Festuca scoparia.. syn. Festuca gautieri Bearskin Fescue Hystrix patula.. Bottlebrush Grass Lagurus ovatus.. Bunny Tails - Annual Luzula nivea.. Snowy Woodrush Luzula sylvatica.. Greater Woodrush Miscanthus sinensis.. 'New Hybrids' Maiden Grass, Eulalia Grass.. Nassella tenuissima.. Mexican Feather Grass Panicum virgatum.. Switch Grass Pennisetum alopecuroides.. Fountain Grass Pennisetum alopecuroides.. 'Moudry' Black Seeded Fountain Grass Sesleria caerulea.. Blue Moor Grass Setaria faberi.. Giant Foxtail - Annual Stipa capillata.. Feather Grass Tridens flavus.. Purple Top Most of them were started as small clumps, using anywhere up to a dozen seeds in a 1.5" square, 3" deep paper plant band. A few were grown in larger containers, up to 1/2 gallon OJ cartons. This year, I'm growing larger clumps, using 3" and 4" square plant bands, and cut-off 1-gallon water jugs. Most species grasses are very easy to grow from seed. The problems are variegated and unusually colored named cultivars. Frequently, they won't come true from seed. I suggest you list the seeds you're considering, and let us comment. It's very simple to transplant and divide most ornamental grasses. The techniques are identical to any clumping perennial The require very little care. They are generally not picky about soil quality, and, once established, tend to be very drought tolerant. Maintenance seldom involves more than an annual haircut, at about this time of year, for deciduous varieties, and less frequent trimming for evergreens. In your zone, you'll have very little problem with invasiveness and self-seeding, due to your shorter growing season. My best advice for growing them from seed is to sow them on the surface, just patted into contact with moist soil. Cool season grasses like Festuca will germinate in cooler conditions than warm season grasses like Miscanthus and Pennisetum.

I don't think that Yellow is an Iris ensata colour. There have been cross breds between the two species, but ones I have seen are usually cream rather than yellow, and i very much doubt that they would spread like pseudacoris. I think you have a pseudacoris there. Also bear in mind that it is not just the vegetative spread that is a worry environmentally. Seeds are likely to be more of a problem. I don't know if birds carry them, but clumps growing by rivers could easily shed seed into the river to be carried far and wide, to create new rogue plantings. Removing seeds is a good idea, but there will always be the possibility of missed pods, or that year when the weather was too bad to go out, or you were sick, or you sold the house and the new owners let them go to seed. If you are in an area where a plant is considered a noxious weed, then the best decision is to get rid of it. It's very altruistic to think you can control it, but it doesn't always work.

robbo1, Gib-San Pools, LTD has a good reputation within the pool industry. Ed seems to be a straight shooter and good businessman. I'm not sure where they are relative to price. Good luck.

Here in colder NH, my late planting of bush beans has to make it through a light frost that always seems to occur around Sept 18. We are in a low area compared to our neighbors in this hilly town. The garden is in wide open whereas at my other house we were surrounded by trees and on a small hill. My mother-in-law only 2 miles away would get a frost before I would. My suggestion is to have some frost protection ready. I like Agribon garden fabric. I have a portable low tunnel that should be covered in Agribon to keep the plants warm. Once that night or couple of nights have passed, we usually get a couple more weeks of warm weather. You can plant hard neck garlic before the ground freezes. Mine produces garlic scapes by the end of June and bulbs are harvested a few weeks later. I planted late bush beans and broccoli seedlings in the same space after adding soil amendments.