Freighter View Farms | Chris Izworski

Every bed at Freighter View Farms starts above the ground. Not because raised beds are fashionable — because the first time I tried to grow tomatoes in the native soil on my lot in Bay City, I stood in the garden in April watching the water pool between the rows and understood that I was fighting a losing battle. Heavy clay, slow drainage, cold soil that held its winter temperature deep into May. Raised beds were not a trend I was following. They were the solution to a specific problem on a specific piece of ground beside Saginaw Bay.

Why Michigan Gardeners Need Raised Beds More Than Most Places

A raised bed warms two to three weeks earlier than in-ground soil in spring. In Zone 6a, where the last frost hovers around May 15th and the season is already short, those two weeks are not a luxury. They are the difference between transplanting in mid-May and waiting until June, between a Cherokee Purple that ripens in August and one that barely makes it before frost.

Michigan springs are also wet. The snowmelt, the April rains, the clay soil that drains like a sponge that is already full — raised beds drain freely because they are above the drainage problem. I have never lost plants to standing water in my raised beds. I lost plants to standing water the first year I gardened in-ground on this lot.

And the soil. In-ground soil in a typical suburban yard is compacted, often depleted, and requires years of amendment to become genuinely productive. A raised bed is filled with exactly the mix you choose — good topsoil, compost, and aged manure — and it gets better every year as you add more compost, as the biology builds, as the roots of successive crops loosen and improve it. By year three, the beds at Freighter View Farms had a tilth that the native soil around them will never have. I could press my hand into them to the wrist.

The Beds I Built

My beds are 4 feet wide and 8 or 12 feet long. Four feet wide because I can reach the center from either side without stepping in — the soil is never compacted by foot traffic, which is one of the main benefits people do not talk about enough. The beds are 10 to 12 inches deep, which is enough for tomatoes, peppers, and root vegetables. Anything shallower is fine for lettuce and herbs but starts to constrain the root development of the heavy feeders.

The material is untreated cedar — more expensive than pine but genuinely rot-resistant. My original beds are still structurally sound after several years, which is the argument for spending more upfront. Pressure-treated lumber has come a long way in terms of safety but I have not switched. The cedar smells good when it warms in the sun. That is not a practical consideration. It is a real one.

What I Put In Them

The initial fill was a mix of topsoil, finished compost, and perlite for drainage — roughly 60 percent topsoil, 30 percent compost, 10 percent perlite. Every spring since, I add a layer of finished compost from the pile in the corner of the yard before planting. The beds sink slightly over the winter as organic matter breaks down, and the compost both refreshes the biology and brings the level back up. I have not added any other amendment in years. The compost does the work.

The beds are on the south side of the house where they get full sun from June through September. Everything else I have done with them is downstream of that decision. Sun is not negotiable for tomatoes and peppers. When I see raised bed gardens built in partial shade, I understand the reasoning — the yard is what it is — but the yields will always reflect the light.

If you are starting from scratch in Michigan and wondering whether raised beds are worth the upfront cost and effort: they are. You will spend one season building and filling them, and then for every season after that you will step into a garden that is warmer, better-drained, and more productive than anything you could have grown in the ground. The investment pays itself back in the first year of tomatoes, and then keeps paying.

For what goes in the beds and when, the Zone 6a planting calendar has the full schedule.

Related reading:

• What goes into these raised beds and how they are arranged: Companion Planting in Michigan.
• The soil that goes into these beds: Composting in Michigan.

Raised Beds in Michigan: Common Questions

What size raised bed is best for Michigan gardens?

4 feet wide by 8 feet long is the standard for good reason — you can reach the center from either side without stepping in the bed, and 8 feet fits most standard lumber lengths. Depth matters more than footprint: 10 to 12 inches of growing medium is the minimum for tomatoes and root vegetables. Shallower beds work for lettuce and herbs.

What should I fill my raised beds with in Michigan?

A mix of roughly 60% topsoil, 30% compost, and 10% perlite or coarse sand for drainage. Avoid fill dirt or subsoil — they compact and drain poorly. In the first year, the compost fraction matters most. In subsequent years, top-dressing with 2 to 3 inches of finished compost each spring maintains the bed. The composting post covers building your own.

When can I plant in raised beds in Michigan?

2 to 3 weeks earlier than in-ground beds — often by late April for cold-tolerant crops. The elevated soil drains faster and warms earlier, which is the single biggest advantage in a short Michigan season. Use a soil thermometer: 50°F for lettuce and greens, 60°F for transplanted tomatoes and peppers.

What wood should I use for raised beds in Michigan?

Cedar is the best option — naturally rot-resistant and untreated. Pine works but needs to be replaced in 5 to 7 years. Avoid pressure-treated lumber in a food garden. At Freighter View Farms the beds are rough-sawn cedar, now in their fourth season with no visible rot at the joints.