Ok good I'll find you some info. @Dwight Ward Maybe listen to this and see if it helps, there are so many to chose from.
Cotyledons are just the "seed leaves" that are usually the fat things attached to the stem before the true leaves form. Beans and most other things are "dicots" with two seed leaves, and grasses and such (like corn) are "monocots" with only one seed leaf. Just a little botany .
Two plants that started well inside and grow super fast... This fast-climber is oregano. This Pum This monster is pumpkin. Sorry for the huge pictures. I reduced their size some but should have done more.
That looks nothing like my oregano, @Dwight Ward . Are you sure that is what it is, does it have that rich oregano smell ? Mine has little tiny leaves all over the stems, and it does not climb at all. This picture is similar to how my oregano looks.
You may want to start another pumpkin 2-3 weeks prior to putting it out, @Dwight Ward. While many plants transplant easily, the cucurbits have a tendency to shock upon transplanting outside. If you intend to grow it to maturity in a pot, no sweat, but if you plan to plant it outside it will shock. I did an experiment with zucchini a number of years ago, and I planted some indoors about 6 weeks or so before setting out, and I direct-seeded another crop. By mid-summer, the direct-seeded plants had outgrown the transplanted ones by quite a lot and continued to outdo the ones I transplanted.
Arg. No organo smell. I have a plant from another planet. I'll plant it at the corner of the house so it can climb to the roof if it wants to and see what strange fruit it might produce. Maybe it's a weed. I'm darn good at growing weeds.
Could I do the thing where, after it warms up, set it out for shorter then longer periods on the back steps? I get good sun there. I'll be prepared to start some new ones if that won't work.
What about a morning glory or maybe a moonflower, @Dwight Ward ? They both have heart shaped leaves similar to what your vine has. Your opening post was about moonflowers, if I remember right.
It could be one of those or it could be a bellflower. I have one of those in another room that's climbing but not as fast because that other window doesn't get as much sun. Darn, I thought I was careful with my seed packets and the labels I put in the pots. Nope, I'm wrong. (I'm only wrong about every 20 years.) The left one is what I thought was oregano, the right is the bellflower. The leaves are similar but not the same. The bellflower has two kinds of leaves. I think I've got one of those plants from Invasion of the Body Snatchers.
It is the roots that are the problem. If the roots are disturbed even a little bit, the plants stop growing for two weeks or more. I transplant pumpkins, but they are the last thing I start inside--2-3 weeks before planting, and I try to do it with soil blocks if I can, but usually use the largest pot I find practical--usually 4 or 6 inches. It is always strange that you can beat up tomatoes every which way, but cucumbers, squash and pumpkins are delicate. I basically transplant everything but carrots and radishes, although I often direct seed peas and beans depending on the weather and how much trouble I want to go to.