Where are you located? Geography and climate makes a huge difference.
If you are in the California area I would highly recommend poison oak with California wild rose and yucca mixed in. The poison oak appears to only affect humans poorly. Birds love the berries and herbivores like the leaves. The California rose grows like a vine and is thorny as shit. The yucca is sharp enough to stab right through jeans without any resistance at all. Various cholla are great too, as they're like cactus except the spines are barbed, which makes them painful to remove.
Where are you located? Geography and climate makes a huge difference.
If you are in the California area I would highly recommend poison oak with California wild rose and yucca mixed in. The poison oak appears to only affect humans poorly. Birds love the berries and herbivores like the leaves. The California rose grows like a vine and is thorny as shit. The yucca is sharp enough to stab right through jeans without any resistance at all. Various cholla are great too, as they're like cactus except the spines are barbed, which makes them painful to remove.
The northeast region
The northeast region
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