It is too early to transplant water spinach outside in Zone 5. This has been a cool Spring, and soil temperatures are too low. When the soil has warmed & night temps are consistently above 50F degrees (preferably above 60F) they can be transplanted. Until the plants go outside, you can root the longest shoots to multiply your plants. Every year, from the first harvest, I save the longest stems, root them, and put in a second row. I may only get a picking or two from that row, but it increases the yield per seed, and lets me freeze a batch or two before frost. As mentioned above, I sometimes root some shoots in a pot from the last harvest, and keep them over winter. If you do so, be sure to wash the stems thoroughly, and do not put that pot back outside. Last year, a few aphids survived, and despite all of my efforts to eradicate them, they multiplied. I eventually had to put the whole pot outside to freeze, lest the aphids spread to my other plants. The seed I mentioned above (years ago) is still going strong - it is at least 10 years old now. Got enough for the rest of my life, if I can keep it alive. But when it is dead, there will be no more water spinach for me, unless I can find another seed source. :-(

I'm not sure... never tried to nurse it back after a freeze when I lived in SoCal, just replanted again with fresh seed (or cuttings). Obviously, wintering over in my present location is out of the question. ;-) If the soil did not freeze, chances are that only top growth was affected, and the root crown is not yet dead. It would take some warmth to revive it, though... maybe even bringing the container in (or protecting it) until warm weather returns. If the plants do survive, they will probably look sickly for awhile. It will be interesting to hear how your plants respond... keep us posted.

Perhaps water spinach. "Ipomoea aquatica is a semiaquatic, tropical plant grown as a vegetable for its tender shoots and leaves." see https://www.google.com/search?q=Water+spinach&ie=utf-8&oe=utf-8&client=firefox-b-1

If there is a Question mark, I havent actually bought the seeds yet Amaranth Calaloo Edible Amaranth, Asia Red ? Edible Amaranth, Tenderleaf? Amaranth, Chinese Multicolor Spinach ? Beans, Cow Pea (mostly I will randomly plant these on cattle panels at the edge of the beds. Probably wont plant them all. Iron and clay and Hardee were bought for groundcover) Bettersnap Big Red Ripper (Mandy) Black-eyed peas Chinese Red Noodle Asparagus (Yardlong) Bean Georgia Long Green Pod Red Seed Asparagus (Yardlong) Bean Hardee Haricots Rouge Burkina du Faso Iron and Clay Kentucky Red Lady Peas Long Bean Taiwan Black Seeded Penny Rile Cow Pea pink eye, purple hull Whippoorwill Black seed, nigella sativa Cucumber (plan is to mingle these with cowpeas) Armenian Ashley Cucumber Barese County Fair Diva Eureka Hybrid Greenfingers H19 little leaf Lemon Marketmore76 Salad Bush hybrid Suyo Long Vertina Eggplant (the eggplant experiment. If we don't like these I don't have to grow it any more) Black Beauty Black Diamond Florida Market Mitoyo Grain Sorghum Greens, Warm Season Balady Aswan Celtuce GOLDGELBER PURSLANE Jewels of Opar manihot, hibiscus Purslane, Golden Purslane, Organic Tall Egyptian spinach Lettuce (these all had slow bolt or heat resistant in their descriptions. They are still going to be spring plantings. I have too many seeds, so I may do the living mulch thing this year) Adrianna Lettuce Anuenue Australian Yellow Looseleaf Black seeded Simpson blush batavians Buttercrunch Butterhead Carioca summer crisp on sale $1 Cherokee CIMMARON Cougar Summer Crisp Lettuce Drunken Woman Lettuce Edox jericho Merveille De Quatre Saisons Butterhead Lettuce (OG) packet Midnight Ruffles Leaf Lettuce Muir Nevada. crisphead New Red Fire Quan Yin Lettuce, OSSI Red Sails Looseleaf Lettuce ( Simpson Elite Lettuce summer mix Summertime Mustard Grow in the bed with nematoade problems Okra (I either have to pare this down or we will be comparing okras in small plantings) Becks Big Buck Burmese Evertender Green Velvet Jade Stewart Zeebest Aunt Hettie's Red Jing Orange‘ Peppers Czechoslovakian black pepper Guajillo Jalapeno Early Joe's Long Cayenne Alma Paprika Charleston Belle Chocolate Cake Figitelli Sicilia, Sweet Pepper Golden Greek Pepperoncini Red Cheese Pepper Sweet Pimento Spinach, Summer New Zealand Spinach Malabar Spinach Squash, Summer Early Bulam summer squash Meot Jaeng I Ae Teot Bat Put Squash, Winter Black Futsu Thai Kang Kob Winter squash Seminole Pumpkin