Sounds like you have a good plan. I have seen it started indoors before and it turned out real good. Just make sure you water the corn in the cup real good before you plant them. Corn don't like the roots disturbed. Then pack the soil some around them and water again real good. Please keep us informed with the progress.

Thanks!

Interesting...I didn't have luck with corn last year. Maybe I'll try starting them indoors. Did you pre soak the seeds on a wet towel at all, or just directly in the cup of soil?

I'm zone 7 as well and my first planting of Sweet Chorus outdoors is up to a great stand and looks wonderful. It took 14 days to emerge. Guess I'm just old fashioned but I can't see starting corn indoors and transplanting. If you get a variety like Sweet Chorus it will be just as fast started in place. The soil outdoors needs to be warm enough anyways or your transplants are just going to set there and not grow.

I'm so early as it is that frost is my next concern. If a frost does come I'll hill soil up around the plants to protect the growing point.

I'm putting in another planting late this week. I'll have about 9 plantings. The last two years that has given corn from mid June until November.

I didn't pre-soak the seeds, just right into the soil (which is about 1/2 dirt 1/2 potting soil, sterilized in the microwave and set in a hot box. I had 25/33 seeds come up at 2.5 days. We'll see how this little experiment goes. Its not my main crop, I'll direct sow about 90 more plants in about 3 weeks. It's main season corn (peaches n cream) and direct sowing at the earliest safe time will get me corn by the end of June, but family is coming to visit mid-june. The plan is that the ones I started indoors will grow in the large cups in the cold frame. It's supposed to frost tonight but by the weekend be back into the 70's. Just after sunset it was 48 and it was overcast all day but the corn soil was still 57 and the outside soil was 52@1". When the sun comes back out tomorrow it'll be like June in the cold frame.

I'm not real sure about the two plants per cup but the website I was reading was a market farmer who put two plants per cell in a 72 cell tray, which I don't know how big that is but I'm pretty certain it's not 16oz's of soil. If it works out I do like the idea of having two stalks together, after I harvesting the corn I'm planning on planting pole beans with the stalks as supports, removing all the foliage off the corn and cultivating deep to hopefully kill most of the corn roots.