Call me a skeptic. It’s OK, because I am one. I always have been. And I prefer to investigate claims, especially those I see on television or social media. The more often I see a social media gardening claim, the less likely I am to believe its validity.
When I write posts for Gardening in a Drought, I use my personal experience, master gardener training and lots of other sources – books I value and credible websites. If I’m uncertain about a site’s credibility, I always try to verify the information. And most of the information I rely on comes from university extension offices. They’re the source for research-based advice for farmers and homeowners. When it comes to growing food in particular, I’ll take research over pins and “likes” any day of the week.
Don’t get me wrong – I love social media platforms! But I use social media to generate ideas and avenues I want to explore. I don’t consider a post or pin originated by a virtual stranger to be the expert word, the final say. And even posts and pins from more credible sources can be problematic. For example, an article might tout the “Best perennials for shade,” but have its origin in a Georgia newspaper. The rainfall and soil in Georgia differ markedly from here in New Mexico. I need a list a little more specific to my conditions. And that’s just one of the problems I have with some of the social media memes and myths. Here are a few examples:
This is the biggest meme of all. When my husband and I discussed that the entire Epsom salt craze must have been started by savvy Epsom salt marketers, I felt ashamed, as if my jaded skepticism had reached a new low. And then I just felt vindicated (so much sweeter). First, I found a pin touting the miracle “salt,” which is really a mix of mostly magnesium and sulphur for soaking feet, as a way to make “all of your blooms more vibrant, healthier, greener, thicker, etc…” Can I just add an editor’s aside here? There is hyperbole, and then there are errors in use of adjectives. Well, I guess it is an error only if you have a bloom color other than green. And right now, I cannot think of a plant with green blooms…
OK, sorry. The pin to which I referred linked to … you guessed it … a company that sells Epsom salt. And the product now lines the walls of the local Walmart when you walk inside. What a racket! I have decided to begin touting the benefits of Physaria and alyssum seeds “to make tomatoes juicier, redder, rounder and larger.” I could make them greener too, I guess.
Anyway, the truth is this: Epsom salts really do nothing for any plant or soil in your garden (link to my Resources page for a few sources). If you have super-acidic soil, which is uncommon anyway, it would be better to amend the soil with dolomitic lime than with Epsom salt. And it certainly is not the way to go in New Mexico, where soil tends to be alkaline. In fact, Epsom salt can do more harm than good.
Household vinegar kills weeds
I’m guilty of picking up on the household vinegar meme. And even household vinegar can weaken weeds to some extent. But the truth is, for vinegar to be truly effective on weeds, it needs to be 20 percent acetic acid. This is not your typical household white or apple cider vinegar.
What you need to really achieve control is the higher concentration acetic acid vinegar solution that is approved for use as an herbicide. It is available commercially in some formulas and from certain local or state agencies. We filled about 10 gallon-jugs at the Upper Hondo Soil and Water Conservation District office a few weeks ago and used their formula to mix it with water and dish soap.
For the most part, the acetic acid weakened, or at least stopped the growth of, many weeds. It’s not selective, however, so if you target a dandelion in the grass, you get dead, brown grass around it if in the spray. In addition, vinegar isn’t a systemic herbicide; in other words, it kills leaves but doesn’t work down to the roots. But I think the acetic acid solution can work well in gravel walkways and along rock walls or paver edges, the areas where grass and weeds poke through. Spray on a warm, sunny day and repeat again as needed. If you want to try the household vinegar on small weeds, you might have some success, but it’s probably better mixed with baking soda as a cleanser!
Use of corn meal to stop weeds from geminating is another myth based on a similar, but commercial product. The bottom line? Take social media advice with a grain of, well, salt. And always check to see if it’s accurate and pertinent for your garden soil and climate. Your best sources are local master gardeners and extension offices, or the best gardeners on your block!