Late October, field picked out. Picture a length of drip line in your hands: where the tractor crossed it, the tape is pressed flat like a ribbon under a book. Two rows over, the same roll is still round and still sitting roughly where it went down in spring.
That contrast is the whole placement argument. Laying drip irrigation hose on the surface is the right default for a vegetable bed only if you can keep wheels and feet off the row and somebody actually pulls the line at the end of the season. Lose either one and the buried line wins, because what ends a surface line is traffic and drift, not the hose itself.
Where surface drip hose fails first
A drip line laid on top of the soil moves. Wind pushes at it, and the polyethylene itself expands and contracts with temperature, so a run that started straight on the bed can finish the season bowed off the row or bunched against a stake. Buried line does not do that; it stays where it was put.
The second failure is mechanical. Surface lines take tractor tires and foot traffic directly, and a tube with a tire track across it is damaged right where the tread pressed it. Both of those problems come from where the line sits rather than from what it is made of. A bed that has to carry equipment is charging the surface run a toll on every pass, and each pass is a chance for a tire to find the tube.
None of that makes surface tape a bad purchase. A garden bed that nothing drives over is a different case from a field where a tractor turns at the end of every row, and the tape itself is not the variable in that difference.
Lay two runs on day one
Suppose you want to see this on your own ground before you commit a field. Take one roll and lay two runs on the same bed: one where the tractor wheels normally travel, one offset from that track. Drive a stake flush with the soil at the start of each run, so later you can see whether the line has walked away from where you set it.
Say the hypothesis out loud before you start, then write down the condition that settles it. If the wheel-track run is the one that ends up crushed or pushed off line, you have your answer about what to manage. If both runs come through clean, the field is not hard on surface placement and you can lay the line wherever it suits the harvest crew.
Watch the first week for movement
The first week tells you most of what you need to know. With the system running, walk both runs and check each against its stake. Look for line that has slid sideways off the bed, line bunched up between emitters, line lifted off the soil where wind got under it.
Early drift points at how the line was laid and at the weather, not at a defective hose. If a run has moved in the first week, the fix lives in how you set it down: the slack you left, the stakes, the direction you pulled it off the coil, rather than in what you bought. That is the difference between changing a product and changing a habit, and it is worth knowing before you order another roll.
Header hose is not drip tape at pull-out
The header is a different animal from the drip line, and the difference shows up in your hands at pull-out. A vinyl lay-flat hose is the common choice for a sub-mainline: durable, long-lasting, and flat when the system is off so equipment can be driven over it. It comes up after each growing season along with the connectors and the feeder tubes, and goes into storage until the following year.
The same polyethylene pipe is somewhat rigid, so rolling it up at the end of the season is not easy. That is the honest picture of retrieval: it comes up, it does not come up quickly. Budget the two jobs separately. Header, connectors and feeder tubes are one task you can plan a crew around; the drip line down the row is a second task, and that one decides whether saving the field's hose is worth the labor at all. Treating the hose as a single item is how a shed fills up with half-coiled tape nobody re-lays.
Three months later, read the wheel track
Three months later, mid-season, walk the wheel tracks and the row ends with a notepad. Three things to note: crush points where tires crossed, connectors that have slipped off their barb, and line that has drifted out of the row.
Crush points are the traffic cost of surface placement made visible; drift is the movement cost. If both show on the same bed, change the traffic pattern or change the placement. A heavier wall does not make a tractor lighter, and it does not stop polyethylene from expanding over a warm afternoon.
Include the row ends in that walk, not just the middle of the bed. Turnarounds are where equipment re-crosses the line, so they show you the traffic pattern faster than anything else on the bed.
Why growers rarely reuse the tape
Drip tube can be reused. Commercial vegetable growers rarely do it. Retrieval, storage and repair cost real money and real hours, and the ecological case for reusing it does not pay that bill. You pull it, you coil it, you store it dry, you patch what cracked, and next spring you unroll something that may or may not lie flat again.
Here is where I will plant a flag. On our own ground we would rather buy for one season than babysit tape through the winter, and that preference holds only as long as the retrieval, storage and repair bill stays above what a fresh roll costs. Cheap labor in February and a dry shed that costs nothing flip the arithmetic, and then saving the tape makes sense.
The condition that overturns the whole surface recommendation is this: if you cannot keep wheels off the bed, or if retrieval cost runs higher than the line is worth to you, then buried line, or counting the tape as a single-season item, is the better call for that field. Same hardware, different decision, because the two costs moved.
Test the pull before you commit the field
If you plan to save a field's hose, run one short check first. At the end of the season, free a short length of drip line from the bed by hand, coil it, and watch how it behaves. Does it come up straight and coil tight, or does it kink, fight you, and want both hands to hold the loop?
Suppose that sample is slow and kinked. Then do not plan on saving the field's line. Nothing in one short length proves how the rest of the bed will behave, but it is the cheapest evidence you can get before committing a crew, and it costs far less than finding out with a whole field.
Confirm one thing before you order
Before you order any hose, get one answer clearly: is this roll meant to be pulled up and re-laid next season, or is it a single-season item? Ask it separately for the header and for the drip line. The lay-flat header, connectors and feeder tubes are routinely retrieved and stored each season, and that promise does not automatically carry over to the tape running down the row.
Why that check and not wall thickness or price per foot: the answer decides whether surface placement pays you back at pull-out. A single-season roll is fine on top of the soil as long as wheels stay off the row and you plan to replace it. A roll meant to come up and go down again tells you that retrieval labor is part of the purchase price, not a surprise waiting in October.