Horsenettle is a persistent weed because of its extensive perennial root system. The taproot often reaches 8 feet (2.5 m) into the soil. Roots in the upper 18 inches (45 cm) can extend 4 feet (120 cm) horizontally from the main plant. Horsenettle spreads more quickly in cultivated land than in undisturbed areas because tillage distributes pieces of root throughout fields. New plants can emerge from rootstocks buried 12 inches (30 cm) below the soil surface, and pieces of root less than ¼ inch long can produce a new plant. Buried root fragments have remained viable for ten years, sprouting when uncovered. No amount of disking and plowing seems to cut horsenettle roots small enough or bury them deep enough to suppress this determined weed.
Another thought is to mark out the plants and either sheet mulch over them or put a burn pile over them to scorch and burn the seeds, I wouldn't do that here in Cali where you are likely to get a wildfire but your area looks pretty green.
kadence blevins wrote:Bit thick here for that. Plus no tractor. Plus a whole freakin lot of space.
Mike Turner wrote:One way to greatly reduce horse nettle is to mob graze each paddock, but at this point, you're more interested in the animal's trampling action rather than in their grazing. Grasses are much quicker than horse nettle to recover from trampling and so will gradually outcompete it.