Have you checked out Weston Gardens in Bloom? It’s a little drive but worth it (down just south of where I-20 and east Loop 820 converge) kinda between south Arlington and forest hill, down in the country just a bit
They sell organic native and naturalized Texas plants that grow well in north-central Texas, with the sales area being divided by how much shade they need, so shopping is easy.
Annnnd across the road is the exhibition gardens where you can see how plants look after they’ve matured.
It’s an old estate they’ve reclaimed that dates to the 1930s-40s where he was an architect and she liked gardening. Wandering down in there is an English garden, a covered walk to a grotto with sun moon and stars in the path, a lily pond and rose garden, a meandering moat/creek that was actually a very long swimming pool, and on the other side of the moat is an “island” that was accessible by suspension bridge where they used hold barbecues and built into the side of the island is a stone ship with rigging just there in the middle of woods where they had dancing and a cabin for guests. (Link below has pics)
There’s more, but those are highlights. And throughout there are plants they sell that you can see as mature landscaping with identifying lables so if something catches your eye, you can see if they have it for sale across the road. And the folks are really helpful and nice and can steer you with your questions above.
Highly recommend clicking on the History page to see info and pics I mentioned above. There’s a decent amount of the stone ship (cabin burned at a party in the 1970s and was restored),
https://www.westongardens.com/