There are plenty of gardening myths that get repeated over and over until everyone takes them as gospel truth. "Pebble trays offer a low-maintenance, stress-free alternative, by gently raising the humidity around your indoor plants." Another one: "Miracle-Gro® Water Soluble Bloom Booster® Flower Food promotes more blooms for greater color!"
Robert Pavlis has spent much of his career dealing with such nonsense on his web site Garden Myths, the YouTube channel Garden Fundamentals, and nine plant science books, two specifically about gardening myths.
Pavlis says, "The amount of water added to a room from a pebble tray is so small that it does not change the humidity of the room. The humidity a few inches above the pebble tray is the same as the whole room."
Bloom boosters are higher-phosphorus fertilizers, such as 15-30-15 for the product mentioned above with phosphorus represented by the middle number. Most general fertilizers have a higher first number, nitrogen. Pavlis writes, "It turns out that in North America, few garden soils have a deficiency of phosphorus, which means that in most of these soils bloom booster does nothing to boost blooms." He says the excess phosphorus actually may be toxic.
And so on. Oft-repeated anecdotes often have no basis in science. Pavlis seems to be a reliable, scientific source.
Here's a myth about Aloe Vera: It is deer resistant. The internet says, "While deer generally avoid aloe entirely, ingesting large amounts of the raw plant can be mildly toxic to them. Severe Drought: If natural food sources are scarce, starving deer will occasionally browse on tender young leaves." This one got bitten by SOMETHING in the past 24 hours:
I just want to point out that it is two days into summer and there is lush vegetation everywhere. If the deer were thirsty, there was a downpour yesterday and the plant saucers outside had water in them. But the part about toxicity is encouraging. I left the plants where they were to see if the deer try them again. Worst case, I have five backup aloe in other locations and the deer get a severe tummy ache.
But this aloe chomping is an anecdote, not a scientific observation. Maybe 99.9% of deer avoid aloe and one Red Lodge deer decided to be a rebel and live dangerously. People are stupid and put things in their bodies that they know aren't good for them, why should deer be different?
Most internet sources also say Aloe Vera has shallow roots. Typical advice is, "Select a wide, shallow container rather than a deep, narrow one." But The Next Gardener, a site where I ordered some succulents three months ago, says, "Taller succulents like Aloe Vera, with deeper root systems, need pots 8-10 inches deep to prevent roots from curling upward (a common issue in shallow pots under lights)." Which is the myth, shallow roots or deep roots? Today I potted up my last 4-inch aloe in a tall, narrow pot.
Maybe it will work, maybe it won't. But as Pavlis the plant scientist says, you can't draw any conclusions from one result. Unfortunately the internet is full of statements that are repeated so often that people believe them as fact. Don't get me started on companion planting.
I presume it was the deer that ate the aloe. I haven't checked the trail camera to verify this assumption. I'm pretty sure it was not the hummingbirds. Or should I say hummingbird. There only seems to be one who visits the greenhouse feeders and the adjacent flowers, a male Calliope. A few weeks ago there was another bird, but he flew around with them perhaps to chase them away. At the house, we haven't gotten many visitors yet this spring/summer, just one or two.
By the way, I have what appear to be pebble trays at the greenhouse, but they are outside, which makes no sense for the supposed humidity-raising effect of pebble trays. They serve two purposes: They protect the soil from splashing in the window boxes from water coming off the gable over the door. And perhaps they provide a place for bees and butterflies to get a drink. I've never seen bees or butterflies use them so maybe that is another myth, but they do work as splash guards.
It's not a pebble tray, it's a splash guard!