Best Greenhouse Plastic of 2026

Condensation is the quiet problem in a closed hoop house. Water beads on the underside of the film, gathers, and lands on whichever leaf is underneath, and that is how a lot of cold-weather trouble starts. chicarry builds an anti-drip additive into its film, something no other roll in this group claims, and we think that single feature is worth more than an extra mil of thickness.

The rest of the package is solid rather than flashy. It's a 6 mil polyethylene film made by five-layer co-extrusion in a 24 by 25 foot roll — wide enough to drape a 12- to 16-foot-wide hobby hoop, short enough that you aren't handling a 40-pound bundle on a ladder. At 14 pounds, the roll goes out to the frame in one hand.

Durability is where this cover comes closest to the top pick: it goes into a second summer without the cracking that ends thinner films, and it holds its shape in wind instead of ballooning between battens. Light through it is soft and slightly milky, which suits summer growing and dims a little in the low sun of January.

The size is the part we keep returning to. Twenty-five feet of length handles a 20-foot house with overhang, and 24 feet of width covers the curve, so most hobby growers buy this roll and use nearly all of it. Below about 10 feet across, you're folding away a third of the sheet, and a narrower cut makes more sense.

PROMORE puts numbers on its film: over 90 percent light transmission and better than 20 percent UV blocking, on a low-density polyethylene sheet. We like a claim we can hold up to the sky and judge, and this one passes — the film reads bright and even, with no hot spots and no cloudiness beyond the usual haze of greenhouse poly.

The 12 by 25 foot roll is a friendlier size than the big hoop-house cuts. It covers a small greenhouse or a 10-foot-wide bed tunnel with overhang to spare, and at 6.45 pounds it's a one-person install with clips or battens. For a first greenhouse, or a second one added at the end of the garden, that's a sensible amount of film to be handling.

Our reservation is longevity. The sheet is 6 mil on the label but light in the hand for its gauge, and without a stated UV life a long, bright summer is a gamble — this is the roll here where a full season in hard sun is least certain. For starting seeds under cover or carrying greens through a mild winter, the light and the easy size make that a fair trade.

A long structure is the case this roll exists for. A hundred feet of length covers a 50- or 60-foot hoop house in one continuous piece, with enough left over for overhang and a doubled end wall — and one piece means no seam running across the roof, which is where covers usually fail first.

Five mil is the trade. That's a step thinner than the 6 mil most of this group uses, and on an exposed ridge you'll notice it in how much the film moves. What you get for it is a 60-pound roll that arrives on a core rather than folded into a bundle, so it unrolls flat with fewer creases — we noticed that immediately when we took the wrap off — and it cuts cleanly with a blade and takes clips, wood strips, or ground stakes without tearing out at the fastening.

This belongs on a large, well-braced frame, not a flimsy one. The film diffuses light rather than passing it straight, which spreads sun more evenly across a wide house and takes the hard edge off midday, and a small puncture patched with repair tape beats replacing a hundred-foot run. On a big structure, the cost per square foot is where we think this roll makes its case; the thinner gauge is what that price buys.

Two cautions. A 60-pound roll is not a solo job, and 24 feet of width takes two people to keep straight in any breeze. And if your house is 20 feet long, you're buying several times the film you need and storing the rest.

This is not greenhouse film in the usual sense, and it's worth saying so up front. Ansgery's cover is a woven polyethylene tarp, double-coated into a 16 mil sheet and hemmed with rust-proof grommets on 18-inch centers. You don't stretch it into a channel and wire it tight; you tie it to a frame.

On an exposed site, that's exactly what we want. Where a hoop house sits on a ridge or at the edge of a field, a 6 mil film flapping against a batten is a season-long fight; a tarp lashed down through grommets every foot and a half stays put, and the reinforced corners take the load instead of the sheet. It lets daylight through, too, though the light arrives softer and a little dimmer than through clear film.

What you give up is a film's advantages. The tarp is stiffer and heavier, so it won't wrap a curved hoop cleanly — it wants flat panels and straight runs, which makes it a better fit for a lean-to wall, a windbreak, or a cold-frame lid than for a quonset. The grommet lines also cast a little shade, and the sheet is heavy enough that one person wrestling it onto a roof in wind is a bad idea.

The grommets are the detail that decides it. If your frame has something to tie to — pipe, timber, eye hooks — this cover goes on faster than channel-and-wire and forgives the gust that would take a film. If it doesn't, the tarp has nothing to grip, and you're better off with a roll you can batten down.

Ten feet wide and fifty feet long is a shape, and it's the shape of a row cover. Legigo's film is what we reach for on a frost night when the beds need covering and the hoop house is already spoken for: unroll it down the row, weight the edges, and pull it back in the morning.

It's 6 mil polyethylene and it cuts easily, which matters more than it sounds — you can take 12 feet off the roll for one bed without fighting a blade across the full width. Once weighted or clipped it stands up to wind, and the whole roll weighs under 10 pounds, so carrying it to the far end of the garden isn't a chore.

Its light handling suits a cover rather than a structure. Draped over a low tunnel, the film keeps frost off leaves and holds some warmth in, though a single layer on a hard freeze won't do the work of a heated house — plan on a second layer or an inner row cover when the forecast goes low. The film is clear enough that winter sun still reaches the soil underneath.

Where it stops is width. Ten feet won't roof a walk-in greenhouse in one piece; you'd be seaming, and seams are where a cover fails first. For a structure, buy a wide roll — that extra width is doing structural work, not just covering more ground.

Eight feet of width answers a specific question: how do you cover a raised bed or a low tunnel without cutting a 24-foot roll down to size? LSGCQ's film arrives at the width that fits a 4-foot bed under hoops with room to spare, and 26 feet of length covers a run of beds in one piece.

Six mil polyethylene with good light transmission, and over a tunnel it does what clear film should — warms the soil, holds moisture in, and lets low winter sun reach the leaves. The roll is light enough to carry in one hand and short enough to handle alone over a low frame, which is not something we can say for the wide rolls here.

Heat is the caveat. In long, intense summers this is a film that can give out before a year is up, and a cover disintegrating over the beds in August is worse than one that costs more and lasts. Where summers are short or the tunnel sits in part shade, that risk drops away.

For a low tunnel you rebuild each season, the width matters more than the calendar: you're covering beds for a few months at a time, and a narrow roll that goes on straight and comes off clean beats a longer-lived film you have to cut down to fit.

A 6.5 by 10 foot piece of film is not a greenhouse cover. It's the sheet you keep in the shed for the night the forecast drops — sized for a few potted plants, a single raised bed, or a young tree that isn't ready for its first hard frost. At 9.6 ounces it folds into a bucket and stays there until you need it.

For that job it's fine. The film is clear enough to pass light through, it drapes without a fight, and it's inexpensive enough that losing a corner to a gust doesn't sting. Unfolded over hoops or a frame with the edges weighted, it does what a frost cover is supposed to do.

The 6 mil label is the part to check. This is one of those rolls where the gauge is a claim more than a measurement — it's noticeably thinner in the hand than the true 6 mil films here, and a sheet that thin needs support. Over hoops it holds; strung across an open span in wind, it shreds.

Where it earns its place is speed. No measuring, no cutting, no ladder: unfold it, drape it, weight the edges, and go back inside. Our advice is to buy it as a consumable — one season, one job, supported by hoops — and it will do exactly what you asked.