How Long Do Microgreen Trays Last?
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How Long Do Microgreen Trays Last?
This article is part of our Microgreen Tray Guide, where we explore how tray design affects workflow, soil usage, durability, and long term costs on a microgreens farm.
In the first article, we looked at the hidden costs trays can create in daily workflow.
In the second article, we measured how long it takes to fill different trays.
In the third article, we explored tray size and why the 1020 format is widely used.
In the fourth article, we looked at tray depth and how it affects soil usage.
In the fifth article, we measured how tray design can affect watering time.
Now we will look at another important factor: how long microgreen trays actually last.
Microgreen Trays Work Hard
On a microgreens farm, trays are handled constantly.
They are filled with soil, stacked during germination, moved between shelves, watered repeatedly, harvested, washed, and stacked again.
This cycle repeats week after week.
Over time that constant use puts a lot of stress on the plastic.
Where Trays Usually Break
From our experience, the most common stress point is at the ends of the tray where you pick them up.
When trays are full of moist soil they become quite heavy. Each time a tray is lifted, the ends flex slightly under that weight.
After hundreds or thousands of lifting cycles, that repeated flexing can eventually cause the plastic to crack.
Once cracks begin to appear, the tray usually needs to be replaced, adding to that pile of shame in the corner of the garage. You know the one.
A Small Durability Test (By Accident)
While preparing this article I was reminded of something that happened a few months ago. I dropped a full stack of trays onto our wooden deck just after washing them. Normally when that happens you expect the bottom tray to crack, because it takes the full weight of the stack.
When I picked the stack up, the bottom tray only had a small dent in it. It went straight back into the system and kept being used.
I actually came across that same tray again recently while washing trays, which is what prompted the video above. Even after months of normal use, the tray is still working perfectly fine.
Durability is difficult to capture in a spreadsheet, but it matters in day-to-day production. Trays are stacked, carried, washed, and occasionally dropped. When trays survive those moments instead of cracking, you avoid the replacements that show up as those jumps in the long-term cost comparison graph.
Why Some Trays Fail Earlier
Many trays are designed for occasional gardening rather than daily production use.
When those trays are used in a commercial microgreens setup, they will begin to show problems sooner than expected.
Common issues include:
- Cracking edges
- Warping after repeated use
- Trays flexing when carried
- Edges becoming brittle over time
None of these problems appear instantly.
But once a tray begins to fail, it often needs to be replaced.
What Manufacturers See Over Time
We asked Bootstrap Farmer about the typical lifespan of their trays.
According to Bootstrap Farmer, they have been selling their extra strength trays for about nine years and have not seen trays fail due to normal longevity.
According to Bootstrap Farmer, they offer a two year warranty from their site and no one ever takes them up on it.
Over very long periods the colour of the plastic may fade slightly, but the structural integrity of the tray generally remains strong.
In some cases they've seen farms close down 8 years after buying trays and are still able to sell their used trays second hand, still in good condition after many years of production use.
Why Durability Matters
When trays fail, the cost is not only the price of replacing them.
There are also practical problems:
- Interruptions to your workflow
- Time spent sorting damaged trays
- Plastic waste that needs to be cleaned and recycled
- Inconsistent trays within your system
Over time, trays that last longer help keep the system more stable.
Thinking in Years, Not Weeks
When choosing trays, it helps to think about how long they will last rather than just the purchase price.
A well designed tray that lasts many years will end up costing less over time than a tray that needs replacing every few seasons.
Durability also reduces waste and keeps your growing system consistent.
Earlier in this series we looked at the long term costs of trays and found something surprising.
Even though cheaper trays cost less upfront, the extra time they added to daily work meant they could end up costing far more over the long term.
In our calculations, the labour differences alone could add up to many thousands of dollars over a ten year period.
Tray lifespan becomes part of that same calculation.
Consistency Makes Systems Easier
When trays last longer, your growing system stays more consistent.
Trays stack properly, watering works the same way each time, and handling becomes predictable.
Replacing trays less often also means fewer disruptions to your workflow.
Looking at the Whole System
Throughout this series we have looked at several design details:
- Hidden workflow costs
- Filling time
- Tray size
- Tray depth
- Watering efficiency
- Tray lifespan
Each detail may seem small on its own.
But together they shape the entire growing system.
In the final article in this series we will bring these ideas together and look at how to choose the best microgreen tray system for your farm.
Microgreen Tray Guide
- Part 1: The Hidden Cost of Microgreen Trays
- Part 2: Are Heavy Duty Microgreen Trays Worth It? We Timed the Difference
- Part 3: What Size Microgreen Tray Should You Use?
- Part 4: How Deep Should Microgreen Trays Be?
- Part 5: Do Microgreen Trays Affect Watering Time?
- Part 6: How Long Do Microgreen Trays Last?
- Part 7: How to Choose the Best Microgreen Tray System
Microgreen Tray FAQ
How long do microgreen trays last?
The lifespan of a microgreen tray depends on its design and how often it is used. Trays used in daily production environments experience far more wear than trays used occasionally for home growing.
Why do microgreen trays crack?
Cracking often occurs at the ends of trays where they are lifted. Repeatedly carrying trays filled with wet soil creates stress in these areas over time.
Are heavier trays worth it?
Heavier trays are often designed for repeated use and may last longer in production environments. For growers using trays daily, durability can reduce replacements over time.