What’s the Best Way to Kill Weeds?
Garden weeds rob sunlight, soil nutrients, water, and growing space from your plants and can harbor pests and disease all of which can lead to a less fruitful harvest. While it’s impossible to completely do away with them, this page will teach you how to reduce their impact to nothing more than an occasional annoyance.
Identifying Garden Weeds: Types of Weeds & Pictures of Weeds
Garden weeds include anything that grows where you don’t want it. In addition to traditional “weeds”, this also includes sometimes wanted plants like grass, vines, and tree seedlings.
Garden weeds can grow at any time of year and can be annual (life and die in the same year), biennial (live and die in two years), or perennial (live several years), each of which presents unique challenges.
- Annual garden weeds are the easiest to fight since pulling them as soon as they sprout means they won’t go to seed. As many as three generations can result from one annual weed in a single season, so the battle with that weed is only over if you pull it before it’s gone to seed.
- Biennial weeds can often be identified by their puff of leaves sprouting from the ground.
- Perennials are by far the hardest to get rid of. Not only do they reproduce from seeds like annuals and biennials, but they can also grow back from their roots and stems.
For a long list of the most common along with photos of each, see Identifying Weeds: Pictures of Weeds.
Identifying Texas Weeds: Pictures of Weeds
Having trouble identifying weeds in your garden? The pictures of weeds below include many of the most common annual, biennial and perennial types of weeds.
Identify Texas Weeds: Annuals
Annual garden weeds sprout and die within a single year, although as many as three generations can result from one annual weed in a single season. They are the easiest to fight since pulling them as soon as they sprout means they won’t go to seed. Following are several of the most common annual garden weeds.
Identify Weeds in Texas: Biennials
The life of a biennial weed lasts two years. They can often be identified by their puff of leaves sprouting from the ground.
Identify Weeds: Perennials
Long-living perennials are by far the hardest to get rid of. Not only do they reproduce from seeds like annuals and biennials, but they can also grow back from their roots and stems.
Preventing Garden Weeds & How to Kill Weeds
The following section applies to all three types of weeds. Unfortunately, it’s impossible for your garden to ever be completely free of weeds. Even if you’ve created ideal conditions to discourage their growth, there’s still a number of ways they can come back…
- Carried in by the wind
- Creep in from surrounding beds or yard
- Dormant seeds churned up from the soil
- Flown in via bird droppings
- Grass clippings, straw, or hay mulch that was not free of weed seeds
The good news is there are several ways to keep weeds at bay so that they become nothing more than a minor annoyance…
The waiting game – when your garden is cleared, tilled, and ready for planting in the spring, wait a week or so for any churned-up weed seeds to sprout. As soon as they do, cut them off just below the soil’s surface with a hoe.
A diamond-head hoe makes fast work of this while disturbing the soil as little as possible (it also allows you to use the hoe while pushing instead of pulling to prevent back strain)… the less you disturb the soil, the less likely you’ll be to churn up additional dormant seeds. Repeat this process again after another week and you can be pretty sure that most dormant weed seeds close to the surface are done sprouting.
Assuming you’ve cultivated extremely healthy soil, your weed problem should be minimal in future years as long as you don’t continue to till up dormant seeds.
A healthy layer of organic mulch spread around your garden plants will serve to block the sunlight necessary for weed growth. Synthetic mulches such as black plastic mulch and biodegradable paper will have the same effect, as will living mulch.
For those tenacious weeds that somehow find their way through, mulch also makes them easier to spot. See Proper Mulching Techniques and Types of Mulch for more information.
Drip Irrigation System
Set up a drip irrigation system or, better yet, a mulch/ drip irrigation combination system – Make weed-seeds-in-waiting depend on the rain instead of your water bill! Drip irrigation delivers water directly where you want it… to your plants and away from the open spaces between them. Click here for more about the right garden watering tools.
Especially good for preventing grass from creeping in and for giving young plants time to get stronger, garden barriers are an effective weed-preventing addition. Commonly used barriers include:
Cold frames (pictured right) are bottomless boxes that allow light in. Their tops can be opened for air circulation and closed for plant protection from all of the elements, including cold air and weeds.
Edgings serve a number of purposes, one of which is weed prevention, especially when using them to create a raised plant bed or when burying them several inches into the ground. There are several types/materials available, including:
- Stone edging (pictured right)
- Plastic edging
- Wood edging – must be replaced more frequently due to rotting
Create weedless walkways around your garden beds. One effective method for accomplishing this is to cover your walkways with a couple of layers of newspaper topped with several inches of straw. After a year or so, the weeds should be completely starved out.
Be a proactive puller
The longer you wait to pull weeds, the more likely they are to go to seed, so make weed hunting a part of your weekly routine. When making your rounds, try to remove as much of the weeds as possible, including the roots.
There are also several effective tools out there to make the job easier. If you’re tired of using your hands, go to your local garden store and try out a few tools.
To get rid of weeds after pulling, add them to your hot compost pile (NOT your cold compost pile unless you want them to live to fight another day).
Good for spot treatment, not all effective weed sprays are made from chemicals. Organic options such as Weed-Aside Herbicidal Soap use vinegar and fatty acids to get the job done. It’ll only kill what it directly touches, so it’s not the end of the world if you accidentally spray a little on surrounding plant leaves when targeting garden bed weeds.
If all else fails and weeds continue to take over your garden bed, it’s time to shift all of your focus towards defeating them. Planting a cover crop such as buckwheat, alfalfa, clover or soybeans means that nothing but the aggressive cover crop will grow in that space for the entire year. It will overtake anything else that tries to grow there, including weeds.
When the cover crop starts to flower, till it into the soil, replant and repeat. After that year’s over, your soil will be healthier and the weeds will be gone.
- What’s the Best Way to Kill Weeds?
- Identifying Garden Weeds: Types of Weeds & Pictures of Weeds
- Identifying Texas Weeds: Pictures of Weeds
- Identify Weeds in Texas: Biennials
- Identify Weeds: Perennials
- Preventing Garden Weeds & How to Kill Weeds
- Apply mulch
- Drip Irrigation System
- Use barriers
- Be a proactive puller
- Organic Herbicides
- Cover Crops
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