By definition, weeds are plants growing at a place we don’t want them. In other words, the battle lines are evident in every garden. Who is winning is the question?
I realize that it’s August and soon to be September and we have been in the garden since March or April. Our memories of being cooped up for the winter have faded. Our motivation is almost inversely proportional to the sweat on our brow.
Yet we are at critical time if you wish to win the battle against weeds. The secret on annual weeds, and we have legions of them, is to prevent them from going to seed. Sure, you have a major long lasting reservoir of weed seeds anywhere you garden, but why add more?
With perennial weeds, if you can send them into the dormant season under stress, you can slowly gain the upper hand. To control any weed, now is the time to pull, cultivate, smother, mow or use one of the safer herbicides.
Deep cultivation will bring a new multitude of weed seeds to the surface. It’s best to just scratch. I have also found that with something like roundup it’s not once and done.
I realize that there have been a few generations between the cursed exit from the Garden of Eden and now. We talk about native plants but I’ll be darned if I have heard much about native weeds.
Many of our worst offenders have been introduced either as ornamentals or by accidents of commerce. Weedy introduced plants can be a scourge because they came without their natural enemies and thus grow uninhibited.
Maybe the worst perennial weed that has thrived since before I was born is the Canada thistle. If you are not familiar with it, you should fall to your knees and give thanks.
If you are, maybe I can offer a little primer on it. Fight it. Fight it! Fight it!! If you see it, pull it or spray it. If it is at a spot you can’t spray, a rubber glove inside a cloth glove soaked in contact herbicide can localize the application.
You say you have tried that and it doesn’t work. The secret is to wear it out. Maybe that’s five or ten or more fight its. It seems that when you pull one, two come back. The same thing seems to happen with early season herbicides.
By the time you first see it, the plant has developed a massive underground root system. A vigilant removal of top growth will slowly weaken the root and the most critical time is now, as the plants starts to move food from the tops to the roots.
If there are no tops, there is no food to send down. It the top leaves get hit now with a translocating herbicide, like roundup, some of it will get to the roots which is a plus, but not a once and done solution.
The spread of weed problems like mile-a-minute weed, poison hemlock and wild cucumber appear to be completely seed dependent. If you spot them, don’t let them get a foothold. Unfortunately, birds will move the seeds of these.
Nowhere have I won the weed battle, but there are places where I have the upper hand and spend little time. At other places, I have just begun to fight.