I plant my corn rows 3' apart. We use one of the hand pushed planters with changeable plates for different seeds. Makes for much straighter rows. Some types of corn cannot be planted together because it will cross pollinate and the results will not be what you want. I don't know enough about the subject to even begin to talk about it. I just look at the seed package or the info online in the seed catalogs.
My plans for next year are as follows. In early March I will use the old Ford tractor to disc the garden three or four times. A week or so later, depending on the weather I will take my little Kioti in with my 4' tiller and till it north-south three times until the soil is very fine. Right before I plant an area I will run the tiller east to west to help mark off the rows. I have to back up into the garden to do this because of fences.
I am planting, from north to south, four types of English Peas. I have never raised these before and am relying entirely on the online catalogs for instructions. I'm planting four different types to see what everybody likes best. Then the next year I will concentrate on that type. They are to be planted in double rows 1' apart with 4' between the double rows. First row will be two staked varieties. Next row will not be staked. These will be planted sometime in late March. At the same time I will plant the first row of potatoes. The English Peas take from 60 to 70 days to be ready to pick. The potatoes take between 90 and 110. All this depends on the weather.
Next will be four rows of Early Sunglow Hybrid corn. This is a very short stalk, very quick maturing variety. It will be planted in mid April. Should be eating fresh corn on the cob by the first of July.
Next is at the end of April when I do my big planting. There will be another row of potatoes. Then three rows of Kentucky Wonder Green Beans (there is no other kind in my opinion) which have to be staked. Then there will be an experiment with Lima Beans. Wife says easier to buy them because she hates picking them but I'm going to plant several different types to see what the family likes the best. There will be half a row of King of the Garden, half a row of Willowleaf, half a row of Fordhook 242, half a row or Jackson Wonder, and a full row of Thorogreen. What will probably happen is what happened to one of my wife's cousins. He planted several types of green beans to see what he liked best and his wife mixed them all together. Too much trouble is what she said.
On the same day I will plant four rows each Honey Select Triplesweet, four rows Peaches and Cream, and four rows of Kandy Korn sweet corn. All these can be planted together.
All rows are spaced three feet apart with a skipped row between plant types. Also the beans have a skipped row between them so there will be 6' between the rows of green and lima beans. I made that mistake last year with my KY Wonder green beans and we had to walk on vines to pick them.
The same day or the day after I plant my main garden I will move to my oldest daughter's house and plant the pea patch. Daughter is 31 and she would eat purple hull peas at least two meals every day if they were available. They are her favorite vegetable. Since the deer ate all 650 row feet of peas I planted last year we are moving them to her house. I will plant three rows each of three different types of purple hulls and three rows of black eyed peas. Rows are 80' long, spaced 3' apart with a skipped row between types. There will also be four rows of Bodacious corn. As far as I'm concerned that is the best type to cut off the cob for cream style frozen corn. I will also leave space for some tomatoes, straight neck squash, and maybe a watermelon plant of two. Had a smaller garden there last year and the four year old granddaughter would go out all the time and eat the cherry tomatoes until her mouth would get sore from the acid. They had to make her understand that she could only raid the plants every other day. Gonna make sure all tomatoes there are bush type.
Next I go to the youngest daughter's house. She has the least space and only has tomatoes, squash, peppers, and such. I will probably move the bell peppers there too.
Finally I will till up the small patch at my house. I have only about a 25' x 15' space and that is pushing it. My vine type tomatoes for salsa and spaghetti sauce go here. Also several cucumber vines for pickles. Squash for the grill and to be fried. Okra in two different varieties will be planted.
I am negotiating with a friend who has commercial chicken houses to get a couple trailers of manure for the gardens. Much better than getting cow manure. The chickens are raised inside and their waste does not have seeds in it. Got some cow manure two years ago and put it on my little patch at my house and some type of weeds nearly choked it out. Had to Roundup the entire spot three of four times to try and kill it out.
I am going to try a gutter garden at our house and maybe the youngest daughter's too. We are going to try carrots, tomatoes, hot peppers, bell peppers, and maybe even some peanuts and cantaloupes just to see how it works out.
My wife works at the local university during June and July. She leaves for work and I leave for the garden about the same time. I work from 8:00 to about 12:00 and then call it a day, I am retired you know. If all goes to plan I will start in early March and not finish until late September when we usually take a two week vacation somewhere.
All this work is to provide fresh and preserved food for three families. We also give away a lot to other relatives and friends. Watermelons, pumpkins, and usually cantaloupes are usually more trouble and take more space that they are worth for me to try and raise. Better bought at Wal-Mart. Peas, limas, and corn is usually frozen while green beans are canned in a pressure canner. Pickles are done in a water bath canner. Have read of several ways to preserve potatoes but usually they will all be gone before winter.
I got carried away writing this but I was finalizing what I'm planting and getting ready to order seed when I read your post so typing this has helped me plan it all out. I put it all on spread sheets anyway.
RSKY