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Several of my readers have commented on my cloches, made on-the-cheap from various bottles that largely have come from my household. By and large, these are one- and two-liter soda bottles. We had an entire winter’s supply of plastic bottles in our garage, awaiting recycling, when the idea came to me that I might be able to use them in my garden.
(Actually, if truth be told, we really don’t drink that much soda from bottles. I, however, love seltzer water, which I buy in two-liter bottles, and average about one bottle a day, whereas my daughters are fans of Walmart’s flavored seltzer, which comes in one-liter bottles. Between the two of them, they probably average eight to ten bottles a week. Yes, that’s a lot of plastic, but our water here is very bad quality, and even purifying it doesn’t seem to remove the bad flavor.)
Initially, I cut the bottles roughly about one-third down from the top of the cap. Two-liter bottles are 12-inches tall, and using a utility knife I cut the bottles at the point where the label ends, somewhere between 7-1/2 and 8 inches from the bottom. I cut the 10-inch tall one-liter bottles in about the same place, two-thirds up from the bottom, along the edge of the label. Then I’d remove the labels and use the bottoms. Later, when I ran out of bottoms, I realized that the tops also could be used with the shorter seedlings.
When I place the bottles over my seedlings, if the surrounding ground is soft, I can push the bottles down into the soil an inch or two, which secures them from toppling or getting blown about in the wind. We have had some windy days, but I have only had a couple of bottles desert their posts. With the fence around the garden — which is really not fencing at all, but deer netting secured to stakes — none have blown away to liter my neighbors’ yards. When I covered the spinach seedlings, which had sprouted in place in their garden setting, I soon learned to loosen the soil surrounding them with my hand spade before attempting to secure the bottles over them. Otherwise, the flimsy plastic of the bottles curls under and the cloches don’t stay in place.
One of the reasons I really like the cloches is that I can pile up the mulch fairly thickly around the plants and close to each individual plant without smothering the seedlings underneath. As the mulch settles into place and weathers down after steady rains, it forms a nice ring around the plants without actually touching the stems. My regular readers may recall that I have been fighting unusually high pH levels in my soil — it measured above 7.5 when we first turned over the soil in March — and after an initial application of aluminum sulfate that brought the pH down to just under 7.0, I have been attempting to maintain and perhaps lower that a bit more with pine needle mulch, graciously provided by my next-door neighbors. The cloches help prevent the needles from actually touching the seedlings, thus avoiding any possible burning from their high acid content.
The cloches also have very nicely protected the plants from rabbits, mice, raccoons, squirrels, ground hogs and all of the other Rodentia that prey from above the soil. Additionally, they had been very effective against the much-despised cutworms that strike from above — that is, of course, until the cloches were removed. They didn’t seem to protect them from underneath though, and the cutworm species that attacks the roots were able to achieve their mayhem unhindered, even with the cloches in place. I’m hoping that I will not have the problem with cutworms in subsequent years as cultivation alone seems to work against them as time goes on.
The two-liter bottles, by virtue of their larger circumference, fit over larger peat pots. I have sprouted my seedlings in 2.5-inch and 1.75-inch biodegradable cells, and the one-liter bottle cloches do not fit around the larger cells. So I have used them on the seedlings in the smaller cells (the lettuce and spinach, for example) and saved the two-liter bottle cloches for the seedlings in the larger cells. My lettuce plants have gotten so large now though that I am transferring the larger cloches to them as they become available. I expect I’ll soon be harvesting some of the lettuce, perhaps within the week.
However, I find I actually prefer the smaller one-liter cloches whenever I can use them. I have found that the flimsy plastic on the larger bottles curls under with age, which makes it harder to push them down into the soil. Loosening up the soil around the small plants first before pushing in the bottles over them helps prevent the curling, but in time the plastic eventually curls anyway. I extend the life of these larger cloches by trimming off an inch of the plastic when it starts to curl, but they will end up in the recycling bin before the season’s end, I’m afraid. The smaller bottles, on the other hand, will likely survive several seasons.
As I’ve needed larger and larger bottles, I started cutting off the bottoms of the bottles instead of the tops. I only take off between an inch and two inches when cutting from the bottle, which gives me a couple of inches more in height. This also is actually a better design functionally for cloches. The plastic at the bottom of soda bottles is a tiny bit thicker, which makes for a sturdier cloche. And the tapered top of the bottle allows debris to slide off easily, optimizing the sun that reaches the plants inside. Additionally, I have the option of removing the bottle cap and watering the seedling inside the bottle without removing the cloche, when I think that not enough moisture is reaching the roots directly under the cloche. This isn’t a frequent problem, though. Being able to mulch up close to the seedling allows the soil to retain moisture much more effectively between rainfalls. And, of course, I water with a soaker hose, so as long as the roots are getting what they need, it doesn’t matter whether or not the surface soil is damp.
I’ve been so happy with my improvised cloches that I’ve started using just about every plastic and glass container that would otherwise head straight to the recycling bin. This is what I’ve learned: I don’t like the gallon-sized milk and water bottles. The plastic in our gallon bottles is milky in color and translucent rather than transparent. I don’t think the seedlings inside get enough light or enough water to best sustain them. I love juice bottles the best, especially the large round Juicy Juice bottles. They are made with a thicker plastic, but are big enough in circumference to fit around larger peat pots. And when the bottoms are cut off, I have the same tapered top and the same option of using them with or without the lids.
Any clear glass or plastic container can be put to use in this way. The only limit is the size of the opening. Smaller jars can be used on tiny first sprouting plants and replaced with larger ones as the plants grow. In time, of course, the plants will outgrow them all, but by that time they will have a more solid footing in this world and be less vulnerable to attack. A loss of one leaf on a large plant is not the potentially fatal blow that it means to a seedling. Roots are larger, stems are sturdier, and leaves are more plentiful on older and larger plants.