I REALLY need advice about corn. Yes, I have been getting something of an edible harvest, but I am SO disappointed with the seed. I saved dried out corn from last year, and I will try to wrestle the kernels loose and save for 2021.
If you recall, in 2019 I planted 2018 seeds and got a marvelous harvest. I had bought these pink coated seeds from a local FS, that no longer sells to the small backyard gardener, just mass quantities to farmers.
I need advice as to what to plant next year, and since you had a big harvest, I am starting with You, @Zeedman !
Chances are the saved seed will under-perform. Most commercially-sold sweet corn is hybrid, in which case the crop from saved seed will revert to a mixture of the parents, and various combinations of their genetics. Even if the corn seed being saved is OP, it may under-perform, unless it was part of a large population. Not to mention the possibility of crosses with any other corn - sweet, field, or decorative - grown within the wind dispersal area (which could be 1/4 mile or more).
Sweet corn is one of the few vegetables I don't save seed for, because of the difficulty of the process, and because I like some of the hybrids. The rural garden has farm fields on two sides - and the nearest one was planted in field corn this year. That not only would make it hard to save pure seed, it restricts the type of sweet corn I can grow reliably. Unlike other vegetables, sweet corn flavor is affected
this year if cross-pollinated with a different type. Of the different types of sweet corn (Su, Se, Sh2 and Synergistic) the Se types are least affected - so those are the ones I grow. IMO they also have the best combination of sweet flavor, a long harvest window, and good frozen quality. "Miracle" has been one of my favorites for years, with huge yellow ears, good husk cover, and short stalks... but it seems to be vanishing from the trade, so I ordered a pound this year. If frozen in small air-tight packets, it should last me 6-7 years.
If you have had success before, you undoubtedly know that the best results occur when sweet corn is planted in blocks. Long narrow rows often result in poor pollination. Specific planting strategies differ, but I use "hills" of 6-8 seeds to help the seedlings break through the soil surface (I have silt clay) then thin to the strongest 4. The hills are spaced 30-36" apart; I generally use 36" from N to S, and 30" from E to W. I use blocks of hills no less than 4 X 4... and used 6 X 6 & 7 X 8 this year. That spacing allows me to run the tiller between rows.
The advantage I see in using hills of 4 plants is increased pollination & better tip fill, especially for plants on the edge of the patch. The 4 plants tend to pollinate each other. For best germination, don't plant too early - I plant sweet corn at the same time I plant beans. Super sweet (Sh2) corns need warmer soil than Se types, so would need to be planted a little later.
To reduce ear worm damage, I spray Bt caterpillar killer onto the silks, with enough pressure to get inside the tip. Weather permitting, I may do this twice, 7-10 days apart. If the spray is able to penetrate, almost every ear will be undamaged - which is important if you are freezing corn on the cob, or giving corn away to friends. Choosing varieties with tight tip coverage is helpful too, another one of the traits I like about "Miracle". The other variety this year (an early yellow & white whose name I lost) had loose tip coverage... which led to some damage from birds.