Frank,
Excellent idea. How bout them figs! And how about the FMD Fig Farm or The Florida Fig Farm?
You can count me in to help when it is time to get to work!
Once I inventory, reconcile, and mark clearly those trees and scion that have been promised to other members, you will have more than one or two babies and cuttings!
Over the past 12 months, I have been in search of the answers to the questions you ask. I have questioned the farmers at Turkey Hill Farm (THF) who have a nice collection of mature fig trees in ground who sell their figs at the Market Square Farmers Market and the owners of Just Fruits & Exotics (JFE) who propagate a massive amount of trees, sell retail/on-line, and have a very nice collection of in-ground trees. Concerning the home growers around the city, most just grow with out any help. The trees are tough and have survived direct attack like yours did as well as some neglect.
I am sure you will get a plethora of approaches from our fig friends. For 8B, here in this part of Florida, read what JFE says [1]. I'll share what I have done with my five in-ground trees (Black Madeira, Hardy Chicago, Kilmartin Celeste, MVSB, Stallion) which is cobbled together advice from THF, JFE, and others on F4FF and GWFF
When is the best time to plant? I vote Fall versus Spring. Last year I planted the Hardy Chicago, Kilmartin Celeste, and Stallion in ground in late September; all are doing great at this point. I planted the MVSB and Black Madeira in early spring; they are struggling. There are more contributing factors. Ultimately my preference is the Fall; October specifically. If you plant immature trees, as you know, you will have to protect them. Last season the first frost was November and the last frost was in March. I use plant maps (frost) and weather underground (temps & precipitation) to keep track.
How far apart should I plant them?
Given your space, plans, the number of fig trees that are said to heat, humidity, rain tolerant, closed/sealed eye, and tasty, I think you can do 20ft spacing comfortably. It will also fit well with your current modus operandi of minimal intervention and letting Mother Nature do what she has done forever. There was a good discussion on GWFF. Here is the link: http://forums.gardenweb.com/forums/load/fig/msg1118152717230.html.
How many trees do you think will eventually fit in a 2 acre area?
I think your two acre space (87,120 square feet) is rectangular shaped. Assuming a length is about four times the width, 20'x20' spacing (400 square feet) per tree gives you space for about 217 (7-8 by 28-32) trees. Wow. If you go tighter, say 15'x15' spacing (225 square feet), then you have space for about 387 (9-10 by 36-40) trees.
How would you arrange them?
Staggered rows...maybe. With special attention (more space) for those trees known to grow large and/or bush/shoot heavily.
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Irrigation system?
Daygrower's suggestion is spot on. Drip tape may be ideal for your use.
Fertilization?
I have followed the JFE recommendations with success. I fertilized in early February and early May with an organic 4-2-4 blend. My plan is to fertilize once more in early August, i.e., right about now. I also added worm castings. And I compost/mulch with either mushroom compost that is available locally via delivery by the yard or some of my own from composted veggie, leaves, and grass if there is enough. I top the casting/compost with pine bark mulch (also sold local by the yard, not sure about delivery). When it is all done it is thick like daygrower suggests. I plan to maintain the use of the 4-2-4 while the trees are young and then just castings/compost/mulch annually as the trees mature.
Pre-planting amendments?
Have you thought about amending the soil? Say add organic material like peat, pine bark mulch, compost, manure, worm castings, leaves, grass clippings, soybean meal (available locally), etc. in advance of planting for a chosen few if not all. At the very least, it will provide a good foundation when you put your prized possessions in the ground.
North Florida Fig Meeting & Scion Swap?
I met daygrower and hex1868 at a grafting class at JFE in the Fall. In addition to swapping scion wood, rootstock, and plants, daygrower turned me on to the Florikan CRF that has been outstanding for my container plants. He also had the brilliant idea of North Florida Fig Friends Meet & Greet and Scion Exchange in the Fall. I reached out to THF and JFE about hosting. We'll discuss off line. More to follow. Just wanted to light the fuse for other fig folks who are in the area.