I have been doing land restoration for over 10 years now. What we do is remove invasive species and plant back native natural habitat in wetlands, forests, and riparian areas. Invasives are hard to get out and the hardest invasive in my opinion is Scott Broom. I have seen them grow as tall as 20 feet, and left untouched they will form a nearly impenetrable wall and choke out native vegetation. Back in the 1940s some one brought them over from Scotland to Vancouver Island as an ornamental and they have since spread over a 1,000 miles clear down to California.
Removing Scott Broom is no easy task. They must be cut out and burned and new sprouts must be sprayed with herbicide several times to clean up an area. You might think, “oh that’s no big deal,” and you would be mostly right but you didn’t know this little bit of information. Those beautiful yellow flowers that fill the bush of Scott Broom in the spring explode and carry seeds in the wind for as far 75 yards and can lay dormant for up to 7 years.
Recently we bought two properties in the foothills a few miles out of town. Beautiful place, great views, but full of Scott Broom. After several work days this winter and with a lot of help we got them cut out, piled up, and burned. The new shoots popped back up this spring and we sprayed them. The place looks great but it will still take vigilance for the next 7 years as we will have to keep checking the hill sides for any new plants trying to work their way back in. The hard work is done, but we have to keep checking and spraying, checking and spraying.
OK, sounds like a great plan, but wait, 3 of my 7 neighbors have Scott Broom too! That means even if I do everything perfect on my place those seeds will keep popping over here and infecting my property and I will always have to be spraying. So since I knew my neighbors would greatly appreciate it, we removed and sprayed some of their plants as well.
Most of the hard work to purity will take place in your first year of going after it,..but you are not done. Long term watchfulness, care, and maintenance are on going. But not to fear, just be aware and also encouraged because the work will ease over time. And when we get clean, we naturally get those around us clean as well.