I set up my first microgreens tray on a spare section of kitchen counter, half convinced it would fail within a week. The seeds germinated in two days. By day ten I was harvesting more pea shoots than I could use in a week. What changed everything was not the technique but the starting point: a kit that included everything in the right proportions so I did not have to guess. If you are new to growing microgreens at home, a purpose-built kit removes the single biggest obstacle, which is figuring out what you actually need before you start.
Microgreens are young vegetable and herb seedlings harvested at the cotyledon stage, usually between seven and fourteen days after germination. They are more nutrient-dense than their mature counterparts and require no soil, no outdoor space, and minimal equipment. The challenge for beginners is that the range of trays, growing media, and seed mixes available is genuinely overwhelming. This guide covers the five best microgreens growing kits available right now, what the differences actually mean in practice, and how to grow microgreens successfully once your kit arrives.
What a Microgreens Growing Kit Actually Includes
Before comparing kits, it helps to understand what the components are and what separates a useful kit from one that looks complete but leaves gaps.
Growing trays: Standard microgreens use two 10×20 inch trays nested together. The inner tray has drainage holes; the outer tray holds water for bottom watering. Some kits use proprietary tray systems. Tray thickness matters more than it sounds: thin trays warp under the weight of saturated growing media and a blackout lid.
Growing medium: Options include coconut coir mats, burlap mats, hemp mats, and loose coir. Mats are easier to handle than loose media and produce cleaner harvests because roots anchor into the mat rather than loose material. Loose coir gives roots more depth but requires more precise moisture management.
Seeds: Kit seeds should be untreated and verified for microgreens use. Germination rates on microgreens seeds run significantly higher than on garden seeds because the seeds are selected for this purpose. The variety selection determines flavor profile: sunflower is nutty, radish is peppery, pea shoots are sweet and mild.
Dome or blackout cover: Covering the tray during germination keeps moisture consistent and simulates the dark conditions that push seeds to germinate quickly. Some kits include a humidity dome; others use a second inverted tray as the blackout cover. A proper blackout period produces taller, more uniform shoots before the uncovering and greening phase begins.
The 5 Best Microgreens Growing Kits
1. Hamama Microgreens Grow Kit — Best Overall
Hamama uses a proprietary seed quilt system: seeds are embedded into a burlap mat at the correct spacing and density, which removes the single most common beginner mistake of uneven seeding. You place the quilt in the tray, add water, and cover. There is no measuring, no sprinkling, and no guesswork about how thick to seed. The trays are sturdy acrylic, and the drainage design keeps roots sitting above standing water rather than submerged, which prevents rot during the extended bottom-watering phase.
The starter kit includes four seed quilts in a variety pack covering sunflower, radish, broccoli, and a mild mix. Replacement quilts are available by subscription or individually. The main trade-off is cost: Hamama is more expensive per harvest than buying bulk seeds separately, but for a first-time grower the consistency is worth it. Germination rates are reliably high, harvests come in on the lower end of the timing range, and the cleanup is straightforward.
Best for: Beginners who want reliable results and a contained system. The quilt format essentially eliminates the two most common early failures: uneven germination and overwatering.
2. Back to the Roots Organic Microgreens Kit — Best Value
Back to the Roots makes certified USDA organic seed mixes and pairs them with straightforward grow trays that follow the standard nested tray format. The kit includes two varieties, a spray bottle, and a coco coir growing medium. Everything is organic certified, which matters if you are growing microgreens specifically to avoid pesticide residue. The price point is accessible, and the seed mixes are well-chosen for first-time growers: the varieties in the starter kit have forgiving germination windows and produce a dense, harvestable mat rather than sparse individual shoots.
The trays are thinner than professional-grade options, which is a fair trade for the price. If you plan to grow continuously after the first harvest, upgrading to heavier trays makes sense. For a first kit, the trays hold up well for several grow cycles.
Best for: Growers prioritizing organic certification and a lower starting cost. Also a good gift option because the packaging and brand presentation are well done.
3. True Leaf Market Microgreens Starter Kit — Best for Variety
True Leaf Market is one of the most respected seed suppliers for microgreens growers and their starter kit reflects that depth. The kit uses standard 10×20 trays with drainage holes, a coco coir growing medium, and includes a wider seed selection than most competitor kits. True Leaf Market seeds are available in over sixty microgreens varieties, and the starter kit gives access to a curated selection covering the major flavor and texture profiles.
This is the best choice if you want to experiment with different varieties from the start rather than growing one or two and then branching out. The tray quality is solid, the coco coir is pre-measured, and the instruction card is clear. True Leaf Market also sells bulk seeds, which means you can reorder only what you want rather than committing to a subscription or a predetermined variety rotation.
Best for: Growers who want to explore different varieties quickly and build toward a regular growing rotation with multiple crops at different stages.
4. Bootstrap Farmer Microgreens Tray Kit — Best Heavy-Duty
Bootstrap Farmer makes the thickest trays in the consumer microgreens market. Their 10 mil trays are noticeably more rigid than standard options, which eliminates the warping problem entirely and makes cleaning between cycles easier because the trays hold their shape under brushing and scrubbing. If you plan to grow microgreens continuously, Bootstrap Farmer trays last significantly longer than thin-walled alternatives.
The kit includes both the solid tray and the drainage tray, with seeds and growing medium sold separately or as an add-on. This is actually an advantage for growers who want to choose their own seed varieties from the start: you are not locked into a predetermined variety selection. The trade-off is that a first-time grower has to source seeds and medium separately, which adds one extra step to the setup.
Best for: Growers committed to regular growing who want equipment that will last through hundreds of cycles without degrading. Also the right choice if you want to control your seed selection from the start.
5. Window Garden Microgreens Kit — Best for Small Spaces
Window Garden designed their microgreens kit specifically for apartment growers with limited counter or windowsill space. The trays are compact relative to the standard 10×20 format, and the self-watering design uses a reservoir insert that delivers water from below without requiring manual bottom-watering checks. For growers who find the twice-daily moisture check during germination difficult to maintain, this system is more forgiving.
The kit includes coco coir discs and a seed mix focused on mild varieties that work well as salad additions. The compact footprint fits on a standard windowsill, which is the primary design intent. Output per cycle is lower than a full 10×20 tray, but for a single-person household the yield per harvest is typically sufficient for garnish and salad topping use.
Best for: Growers with limited space, apartment dwellers, or anyone who wants a low-maintenance system with a smaller footprint. Also a good option as a second compact kit alongside a larger setup.
What to Look for in a Microgreens Growing Kit
Tray thickness: Thin trays are the most common complaint in negative microgreens kit reviews. A tray that warps under the weight of wet growing medium and seeds creates uneven water distribution, which produces patchy germination. Look for trays described as 10 mil or thicker, or read reviews specifically for mentions of warping.
Growing medium type: Coco coir mats are easier for beginners than loose coir because they hold their structure and produce cleaner harvests. Loose coir gives slightly better root development but requires more attention to moisture distribution. Either works; mats are more forgiving.
Seed quality and sourcing: Seeds sold for microgreens use should be untreated, meaning no fungicide coating. Treated seeds are common in garden seed packets and the coating is not safe to consume at the seedling stage. Reputable kit suppliers specify untreated, food-safe seeds. If a kit does not mention this, check before buying.
Variety selection: A good starter kit includes at least one mild variety (sunflower or pea shoots) and at least one more assertive variety (radish, mustard, or broccoli). This gives you a useful flavor range for cooking and lets you identify which styles you prefer before buying bulk seeds.
How to Grow Microgreens Step by Step
- Prepare your tray: Place the drainage tray inside the solid tray. If using a coco coir mat, lay it flat and add water until it expands fully. If using loose coir, fill the drainage tray to about one inch depth and level it off. Do not pack it down.
- Seed evenly: Distribute seeds across the growing surface in a single dense layer. For small seeds like broccoli or radish, this means covering the surface so little medium is visible. For larger seeds like sunflower or peas, space them so they are touching but not stacked. Uneven seeding causes gaps in the mature canopy and uneven harvest density.
- Water gently: Mist the surface with a spray bottle until the medium is uniformly moist but not saturated. For bottom watering, add water to the outer tray so it wicks up through the drainage holes.
- Cover and blackout: Place a humidity dome, second inverted tray, or opaque cover over the seeds. This maintains moisture during germination and triggers the etiolation that produces taller, more uniform shoots. Keep covered for two to three days, checking moisture once daily.
- Uncover and expose to light: Once seeds have germinated and shoots are touching the cover, remove it and move the tray to your light source. A bright windowsill works; a dedicated grow light gives more consistent results. The shoots will green up within twenty-four hours of light exposure as chlorophyll develops.
- Water from below: From this point, water by adding to the outer tray rather than misting the canopy. This keeps the canopy dry, which reduces mold risk significantly. Check the outer tray daily and top up as needed. The medium should stay consistently moist but never waterlogged.
- Harvest: Most microgreens are ready when the first true leaves are just beginning to appear, typically between seven and fourteen days depending on variety. Cut just above the growing medium with clean scissors. Rinse, dry with a salad spinner or paper towels, and use immediately or store in the refrigerator for up to five days.
Growing Microgreens Indoors: Light, Airflow, and Watering
The three variables that determine whether indoor microgreens succeed or fail are light intensity, air circulation, and watering discipline.
Light: A south-facing windowsill provides adequate light during summer but may fall short in winter months when day length shortens and light intensity drops. A dedicated LED grow light on a twelve-hour timer eliminates this variability entirely and keeps growth rates consistent year-round. You do not need a high-powered light for microgreens: a basic full-spectrum LED panel positioned four to six inches above the canopy is sufficient.
Airflow: Mold is the main failure mode in indoor microgreens, and poor airflow is the primary cause. A small fan on low setting, running intermittently or continuously on the lowest speed, keeps air moving across the canopy and prevents the humid stagnant conditions that mold requires. In my kitchen setup, even cracking a nearby window when weather permits makes a noticeable difference in canopy health.
Watering discipline: The most common cause of failed indoor microgreens is overwatering during the germination phase. Seeds that sit in standing water or in saturated medium will rot before they germinate. Moist, not wet, is the target. Once germinated and uncovered, switching entirely to bottom watering from the outer tray removes the temptation to mist the canopy and keeps the surface dry where mold would otherwise take hold.
Frequently Asked Questions
How Long Does It Take to Grow Microgreens?
Most microgreens are ready to harvest between seven and fourteen days from seeding. Fast-growing varieties like radish and mustard come in closer to seven days. Slower varieties like sunflower and peas typically need ten to fourteen days. Temperature affects timing: warmer environments speed germination and growth; cooler environments slow them. A temperature range of 65 to 75 degrees Fahrenheit produces the most consistent results.
Do You Need a Grow Light for Microgreens?
Not necessarily, but a grow light makes indoor growing significantly more reliable. A bright south-facing windowsill provides enough light during summer and in climates with long day lengths. In winter, or in any room without direct sun for most of the day, a full-spectrum LED grow light eliminates light as a variable and produces more consistent growth. For growers who plan to grow year-round, a basic seedling LED is a worthwhile investment.
Can You Reuse the Growing Medium?
Growing medium is not typically reused between cycles. Roots become tangled in the mat or loose coir, and spent medium can harbor pathogens that affect the next crop. Coco coir mats are compostable. Loose coir can be added to outdoor compost. Trays are reusable indefinitely after thorough cleaning with a dilute hydrogen peroxide solution, which sanitizes without chemical residue.
What Are the Easiest Microgreens to Grow?
Radish, sunflower, and pea shoots are the most forgiving varieties for beginners. Radish germinates quickly, produces a dense canopy, and is very tolerant of minor moisture fluctuations. Sunflower produces large, satisfying shoots with a mild flavor that works in almost any dish. Pea shoots are slow to germinate but very forgiving once established. Avoid basil and cilantro for first grows: both have lower germination rates and require more precise moisture control.
How Many Times Can You Harvest from One Kit?
Most microgreens produce a single harvest per seed planting. Unlike herbs, microgreens do not regrow after cutting at the cotyledon stage. The kit components, including trays and growing medium, are reusable for multiple cycles. Replacement seeds and fresh growing medium are the only consumables after the initial kit. Some kits offer subscription seed refills; others allow you to source seeds independently from any supplier.
For more on what to grow once you have your kit set up, see the microgreens growing guide or the breakdown of the best microgreens to grow by flavor and difficulty. If you want to go deeper on technique before your first harvest, the full how to grow microgreens guide covers each stage in more detail.