Kristen,
You’re getting great input here, but I just have to put in my 2 cents, too.
I found the idea of native plants before I found permaculture, and I still think there is value there. The seminal book on native landscaping in Dallas, and the rest of Texas, is “Native Texas Plants: Landscaping Region by Region” by Sally Wasowski. It’s from 1988/1991, and should be in the public library and is on amazon. She’s not really a permaculturist so her terminology is different, and most of the plants are not human-food-producing, but it is a beautiful book if nothing else, and I think you will learn a lot from it. The regions referred to are actually soil types, and the plants that will grow are different per soil type. The Dallas/Fort Worth metro area straddles soil-type boundaries, so you need to know where you are.
In another thread, you mentioned having a yard full of post oaks, so you probably have Eastern Cross Timbers soil. Mustang grapes also prefer this sandy-clayey soil, but are more adaptable. That may help you with more specific web searches or plant database searches. I also have Cross Timbers soil. I notice goldenrod, lambs quarters, blackberries, mulberries all volunteer here. For squash borers, I have a friend who swears that interplanting squash with lantana repels them. I love lantana anyway. Don’t neglect the cool season plants, either.
A few of Wasowski’s plants for Cross Timbers are mulberry, virginia creeper, yaupon holly, coralberry, eastern red cedar, possum haw, smooth sumac, beauty berry, yucca, butterfly weed, spiderwort, mexican plum, phlox, redbud, violet, plus typical wildflowers (reseeding annuals).
A more shotgun approach to plants, especially in prepared beds, would be to visit Marshall Grain’s nursery in Grapevine. Buy lots of bedding plants and see what survives. They have quite a bit of natives, and a lot of the herbs they have grow well here in relatively poor soil. You may find someone knowledgeable about organics and natives working there. I haven’t found permaculture there so far.
Also, many permaculture teachers caution against too much emphasis on natives-only. There are many plants that are not, strictly speaking, native to here, that still do well here without a lot of fuss and are very useful. Why would you avoid using such plants? You don't like peaches?
I think it is good to help the natives, as Tyler said, because the mainstream is so against them. But we needn’t limit ourselves to only those.
About soil improvement…. Permaculture people almost always start with human damaged
land, not with wild land. Intact native prairie soil is teaming with life, plant
roots, fungi, and other organic matter. It is *not* poor, or crummy, or “just dirt”. But of course, those are good descriptions of what we find here and now. Our burned-out, abused, compacted soil can hardly support life, and soil must be alive to support the plants you want. Depending on the history of your land, you will likely have to do some remediation to get even native plant diversity to thrive there again, and you will likely have to baby many of them for the first year or two. So adding compost and mulch is not just for Portland—it is the fastest way to remediate and bring the soil back to life. Don’t worry that the amount of compost or
wood chips you could practically add will turn your yard into deep forest duff covered in ferns—it won’t. You won’t even be able to find it a few months later
. Permaculture talks about using human intervention like compost and mulch to speed up natural processes. The land would repair itself eventually, if humans just quit messing up the process, but it might take 200 years. With compost, mulch, some minimal aeration, some temporary irrigation, maybe some animals, a good permaculture designer can get it going in just a few years by mimicking natural processes, but speeding them up.
I suggest going through Gaia’s Garden very thoroughly—several times through. You will be richly rewarded. Do that before spending a lot of time on Google, and you’ll get going much faster.
The forums here are great, too, and there are a lot of good books. But Gaia is a great place to start. Plus observation, of course.
All the best!