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Microgreens kit vs DIY: what the costs are made of
The tray is a one-time purchase. Seed is the cost that returns with every sowing.
A microgreens kit is a bundle: a small amount of seed, a tray or mat, and instructions, sold as one purchase. A DIY setup is the same parts bought separately, with seed in a larger bag and trays you can wash and sow again. The first purchase can look similar. The second and third trays usually do not, because seed is the cost that repeats, and tiny packets are an expensive way to buy it.
University of Maryland Extension states the packet problem directly: seed sold in 1/32 ounce packets can cost about 30 times more per seed than quarter-pound bags. That is the main reason a kit is convenient once and a bulk bag is cheaper if you keep sowing. This page does not price a named brand, and it is not a receipt from a purchase made for the article. The dollar figures below are either labeled example ranges for planning, or they are copied from an extension publication that printed its own snapshot.
What you pay for once, and what you pay for again
Split the shopping list before you compare prices. Trays, a lamp, and a pair of scissors are tools. Mix or a mat is partly a tool and partly a consumable, because you replace or refresh it. Seed is a consumable every sowing. Water and electricity are small next to seed for a single tray, and they grow only if you run a lamp many hours a day. Maryland suggests LED lamps use less energy than fluorescent lamps for a similar amount of light, and that a timer can run lights when your utility's rate is lower. It does not publish a monthly bill, so this page will not invent one.
Penn State Extension's home guide says a household crop does not require special tools, and that aside from seed you may already own a container, a spray bottle, and a way to measure. It also says that if you grow continuously, trays made for the job are convenient. That is the kit-versus-DIY choice in one sentence: pay once for simplicity, or assemble parts you will reuse.
Example price ranges, not a survey
The next table is a planning sketch. The ranges are round numbers for comparing categories. They are not quotes, not averages from a market study, and not tied to a retailer. Replace every cell with the price in front of you. If a kit is far above the top of the band, or a tray is far below the bottom, the band was only a placeholder.
| Piece | Example planning range | How often you buy it |
|---|---|---|
| Small kit (tray or mat, a little seed, instructions) | $15 to $40 | Once per kit. Seed inside is usually one or two trays. |
| Pair of shallow trays, one with holes and one without | $3 to $12 | Once, then wash and reuse. |
| Bag of soilless seed mix or a block of coir | $8 to $20 | The bag fills many trays. A mat is often one use. |
| Simple lamp and a plug-in timer | $25 to $70 | Once, if a window is not enough. |
| Seed by the small packet | Often the expensive way per seed | Every sowing, unless the packet is large. |
| Seed by the quarter pound or the pound | See the extension snapshots below | The bag lasts through many trays. |
Read the packet row next to Maryland's "about 30 times more per seed" line. A kit can hide that markup inside a single price. You are paying for the tray and the lesson as well as the seed, which is fair for a first try. It is a weak way to supply tray five.
Seed cost snapshots from extension pages
Utah State University Extension printed seed cost per pound and per 1020 tray as of January 8, 2026, using a bulk rate of 5 pounds or more. The publication does not frame those dollars as a permanent price list. They are a dated snapshot, useful because they show how crop choice changes the tray cost even when the price per pound looks modest.
| Crop in the Utah State table | Seed per 1020 tray | Published cost per pound | Published cost per tray |
|---|---|---|---|
| Arugula | 10 g | $8.22 | $0.17 |
| Kale | 28 g | $6.41 | $0.37 |
| Radish | 42 g | $10.19 and $22.60 for two types | $0.88 and $1.95 |
| Sunflower | 48 g | $4.54 | $0.45 |
| Pea | 150 g | $3.78 | $1.16 |
| Basil | 28 g | $32.14 | $1.84 |
| Broccoli | 28 g | $19.58 | $1.12 |
| Cilantro | 28 g | $4.89 | $0.28 |
Pea seed in that snapshot is cheap per pound and still more than a dollar a tray, because the sowing is 150 grams. Basil is the opposite shape: less seed than pea, a much higher price per pound, and a higher tray cost. Arugula is the inexpensive tray in the same table. If you are comparing a kit labeled "spicy mix" with a DIY radish tray, look at grams, not just the sticker on the bag. The calculator will apply your own price per pound, ounce, or kilogram to the gram rate, which matters once the January 2026 snapshot is out of date.
Penn State Extension published a separate cost sketch from its hydroponics and aquaponics course, and it says to adjust the values for your own situation. In that sketch, trays, peat-based mix, and fertilizer come to about $0.67 per tray. Seed, based on a 10 gram sowing, runs from about $0.47 to more than $2.21 per tray depending on species. Labor in the same class was on the order of a few minutes of planting and about 4 minutes to harvest with scissors. Those are course estimates for their trays and their 10 gram rate. Utah State's radish and pea rates are heavier than 10 grams, so a seed bill scaled from the Penn State 10 gram line would understate those crops. Use the sketch to see the shape of the costs, not as your receipt.
Which one to buy first
Choose a kit if you want a single finished tray and you do not want to store a pound of seed. You will learn the cover, the light, and the cut with almost no leftover supplies. Choose DIY if you already know you want a tray every week or two. The trays and a lamp, if you need one, are the durable part. The seed bag is the part Maryland's packet comparison is about.
A middle path is a DIY tray with one small packet of a single crop, then a larger bag only after you know you will eat that flavor. Radish and pea are the usual pair to compare, because the seed weights are far apart. That comparison is in pea versus radish, and the gram chart behind it is in seed density per tray.
Skip any kit or bag that does not say the seed is untreated if you will eat the seed coat with the green. Penn State Extension warns that treated seed is a poor fit for microgreens for that reason. Also skip garden soil dug from outdoors. Maryland says it is too dense for these trays and tells you to use a soilless mix.
What this comparison leaves out
Yield changes the cost per bite, and it is not one number. Penn State's 2016 to 2017 greenhouse records, at a 10 to 15 gram sowing, included about 148 grams of arugula per tray and about 47 grams of cilantro. Those were greenhouse trays on the lighter Penn State rate, not an apartment sill. Do not divide a kit price by those grams. Electricity, water, and a molded tray are unpriced here. The apartment method and the bottom-watering steps matter more on tray two than the box the first one came in.
FAQ
Is a kit always more expensive than DIY?
Not for a single tray. A kit can be the simpler first purchase. It becomes the expensive path when you keep buying small packets of seed. University of Maryland Extension says tiny packets can cost about 30 times more per seed than quarter-pound bags.
Why do the tables show different seed costs for one tray?
They measure different things. The example ranges are planning sketches with no retailer behind them. The Utah State dollars are a bulk-price snapshot from January 8, 2026, at that publication's gram rates. The Penn State dollars are course estimates at about 10 grams of seed, on that program's trays.
Does a more expensive seed grow better?
These pages do not rank brands, and this site has not grown the crops. Price per pound in the Utah State snapshot is not a quality score. Basil cost more per tray than sunflower in that table because of price and sowing rate, not because one is a better microgreen.
Should I include a lamp in the first budget?
Only if your window is weak. Several extension guides say a bright window can grow microgreens, and they also say lamps give more control. The windowsill guide explains the limit. A lamp is a one-time cost in the example table, not a per-tray cost.
Sources
- Jon Traunfeld, Growing Microgreens and Baby Greens Indoors, University of Maryland Extension, revised March 2026. Packet versus bulk seed, light notes, and media.
- Stephen Beck, Grow Your Own Microgreens, Utah State University Extension, updated January 2026. Seed cost snapshot dated January 8, 2026.
- Elsa Sánchez and Robert Berghage, Growing Microgreens, Penn State Extension, updated December 16, 2025. Course cost sketch and 2016 to 2017 yield averages.
- Francesco Di Gioia, A Step-By-Step Guide for Growing Microgreens at Home, Penn State Extension, updated September 20, 2026.