How can I get Flowering vines on a trellis 8x8 on my deck? In NY

How about clematis or lilac sematis?

Not sure if your zone, But Jasmine is nice,coral honeysuckle,clematis,varigated kiwi,hyacinth bean,morning glory.

autumn clematis should do well in your area. Morning glory can be invasive.

Hello Franchesca, First of all, in NY, you must choose a plant that will come back from yr to yr. This is a Perinal. If you choose a Annual, you will be replacing this plant, from yr to yr. I have Rose of Sharon's, and these are great. They come in diff. colors and will grow very nicely. You can always start new ones, from saving a twig of it, and placing it into water. (Always cut it on a angel, so the veins will get more water). If you get a plant, that is not pleasing to you, then you can replace it with one you will like. We have lots of the Rose of Sharon's, and they are lovely. When they get older, about 5-6 yr. older, then you can cut the top off, each fall, and the strength will go to the main stem, for a stronger growth the next yr. Enjoy, and do plant diff. colors within this area, you will love them. I trust this helps you. We used to live in NY, and we know how nippy it will be in the winter, Judy.

Hi, I'm on Long Island zone 7, too, and have had good luck with clematis. I plant them in large, deep pots so the roots have plenty of room, and so I can plant some annuals at the base of the vine without doing damage to the roots. I just stick a store-bought metal trellis in the pot. With a large trellis like yours, they will have plenty of room to grow. There are a huge variety of clematis in purple (jackmanii), lavender, white, blue, red, yellow and striped flowers. Some bloom all summer long, some are more seasonal. I've over-wintered them outdoors in the pots for a few winters now, and you know some have been pretty cold with plenty of snow. There are varieties that grow quite tall, over 10 feet, and some that are much shorter, like 5-6 feet. All should scramble right up your trellis, though they might need just a bit of training with some loose ties.

They die back in the winter, but come right back in the spring. Choose carefully, and you can have flowers from early May right through Fall.