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15+ DIY Soil Block Makers for Efficient Garden Seed Starting in the US

Posted on 10/02/202604/05/2026 by Karissa Garza
Affiliate Disclosure: If you buy through links on our site, we may earn a small affiliate commission to help support the blog – at no extra cost to you. It never influences our product selection process. Thank you!

Looking for a way to start seeds at home without using plastic pots or expensive tools? You can create soil blocks yourself with simple items found around your house.

Hands using a soil block maker to form soil blocks on a wooden workbench outdoors with gardening tools nearby.

Using these DIY soil block makers helps you grow strong plants while saving money and cutting down on plastic waste. This guide offers 17 easy ideas to get you started.

1. Simple Wooden Frame for Soil Blocks

A wooden mold soil block maker filled with soil on a wooden table surrounded by gardening tools and seedlings.

You can build a sturdy soil block maker using scrap wood and a flat board to press soil into shape. This method helps you create even blocks that support seedling growth. It is a practical choice that lets you adjust size and shape for your gardening needs.

2. Making Soil Blocks with PVC Pipe

A set of PVC pipe soil block makers with soil blocks and gardening tools on a wooden workbench.

You can create soil blocks using a short piece of PVC pipe and a plunger. Fill the pipe with damp soil mix, then push it out using a dowel or similar tool. This method is affordable, easy to use again, and simple to clean after each use.

3. Using Ice Cube Trays to Make Soil Blocks

Close-up of an ice cube tray filled with soil blocks on a wooden table surrounded by gardening tools and plants.

You can turn old ice cube trays into simple molds for starting seeds. Fill each section with moist soil and press gently to form firm blocks. This way, you create many blocks at once, making seed starting quicker and easier for your garden.

4. Muffin Tin Soil Blocks

Four muffin tins filled with soil blocks on a wooden table surrounded by gardening tools and seed packets.

You can use a muffin tin as a simple tool to shape soil blocks for starting seeds. Fill each cup with your soil mix and press it down firmly with your hand or a small tool. The even size of each cup helps keep blocks uniform, making it easier when you move seedlings later.

5. Using an Aluminum Can to Make Soil Blocks

Five aluminum can soil blockers on a wooden surface with soil and seedlings nearby.

You can transform an empty aluminum can into a soil block mold by cutting off its top and bottom. Press moist soil into the cylinder and use a plunger to pack it firmly. This method saves money, recycles materials, and helps you create compact seed-starting blocks easily.

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Upgraded Soil Blocker Handheld, 8 Soil Block Maker for Seed Starting, 2 inch Manual Quad Soil Blockers Maker, Soil Blocking Tool, Soil Blocker Kit
Upgraded Soil Blocker Handheld, 8 Soil Block Maker for Seed Starting, 2 inch Manual Quad Soil Blockers Maker, Soil Blocking Tool, Soil Blocker Kit

Upgraded Soil Blocker for Seed Starting:Soil Blocker Set Simply and Quickly make a set of 8 pcs 2" quad soil blocker.It reduce the need for wasteful plastic seed cell trays and save your time and money.

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Hand-held Soil Blocker 4x2 Inch Seed Block Makers at a Time Soil Block Maker for Soil Block for Seed Start Garden Soil Potting Soil for Outdoor Plants (Plastic Seed pins)
Hand-held Soil Blocker 4x2 Inch Seed Block Makers at a Time Soil Block Maker for Soil Block for Seed Start Garden Soil Potting Soil for Outdoor Plants (Plastic Seed pins)

🌱《DURABLE and BEAUTIFUL》 This gardening tool is made of high-quality and durable galvanized steel,Sophisticated structure, simple to use, can be used repeatedly for a long time,reducing the demand for plant trays.

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6. 3D Printed Soil Block Tool

A set of colorful 3D printed soil block makers on a wooden table with freshly made soil blocks and gardening tools nearby.

You can create your own soil block tool using a 3D printer. This allows you to adjust the size and shape to fit your garden needs. It supports a more eco-friendly approach by reducing the use of plastic pots. Printing your tool gives you control and precision.

7. Flexible Silicone Seed Block Mold

Seven colorful silicone mold soil blockers on a wooden surface with soil and gardening tools around them.

You can turn silicone baking trays into handy seed block molds for your garden. Their soft, bendable material lets you pop out soil blocks without breaking them. These molds clean easily and can be used again each planting season, saving time and effort.

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Large Tray Molds - Mold Size:10.6x7.6x1 very suitable for display and placement of your own accessories. DIY your unique tray, show off your great taste! It will look eye-catching in any room

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Ryscam 10pcs Reusable Seed Starter Tray, 120 Cells Seed Starter Kit, Silicone Seedling Starter Trays for Starting Plant Seeds with Flexible pop-Out Cells, Indoor Gardening Plant Germination Trays
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【Silicone Seed Trays】:These sustainable silicone seed starting trays are durable, reusable, and easy on tender young roots. All you need to do is to gently push the silicone at the bottom of the seedling tray to get a entire root ball, no tugging or tearing required, do no harm to plants root.

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Sakolla 126 Cavities Square Candy Silicone Molds, Mini Silicone Molds for Chocolate, Hard Candy, Ice Cubes, Caramel
Sakolla 126 Cavities Square Candy Silicone Molds, Mini Silicone Molds for Chocolate, Hard Candy, Ice Cubes, Caramel

Made of food-grade square silicone mold, make 126 gummies in one go, each square capacity 2 ML, 0.6"x0.6"x0.4"

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8. Using a Drawer Handle Mounted on a Base

An old drawer handle with attached base resting on a wooden surface with gardening tools in the background.

You can attach an old drawer handle to a flat surface to create a hand press for shaping soil blocks. This setup lets you control how firmly the soil is packed, helping keep the blocks consistent. It’s an easy way to turn common household parts into a practical gardening tool.

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Legigo 100 Pcs 30mm Peat Pellets Seed Starter Soil Pods- Seedling Soil Block Peat Pods for Seed Starting, Compressed Seed Pod Starter Plugs for Garden Plant Cuttings Herb Flower and Vegetables
Legigo 100 Pcs 30mm Peat Pellets Seed Starter Soil Pods- Seedling Soil Block Peat Pods for Seed Starting, Compressed Seed Pod Starter Plugs for Garden Plant Cuttings Herb Flower and Vegetables

What You Get: Each package includes 100 pcs of 30 mm peat pellets. Just add water, and the seed starter soil will rapidly expand to 8x their original size, forming individual seedling pots. No messy soil prep required, simply place seeds to start growing. Ideal for starting multiple seeds and seedlings, the ample quantity meets daily seedling-growing needs, making seed germination a breeze

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SunGro Horticulture Seedling Mix - Organic Seed Starting Mix - 8 Quart - Lime, Perlite, Sphagnum Peat Moss
SunGro Horticulture Seedling Mix - Organic Seed Starting Mix - 8 Quart - Lime, Perlite, Sphagnum Peat Moss

VERSATILE SEED STARTING: Ideal for germinating seeds in flats, pots, and plug trays. This seed starter mix supports healthy root development for vegetables, herbs, and flowers.

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Burpee Organic Coconut Coir Concentrated Seed Starting Mix, 16 Quart
Burpee Organic Coconut Coir Concentrated Seed Starting Mix, 16 Quart

ORGANIC COCONUT COIR: Made from recycled coconut husks, coir is a light, sustainable growing medium that holds the perfect amount of moisture for starting seeds. 100% biodegradable soil alternative. Environmentally-friendly and a renewable alternative to peat moss. OMRI listed and certified organic.

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9. DIY Soil Block Mold from Plastic Bottles

Close-up of upcycled plastic bottles used as soil block makers filled with soil on a wooden table outdoors, surrounded by gardening tools and plants.

You can turn a plastic bottle into a simple soil block mold. Use the bottle’s bottom to form the block shape. The neck of the bottle works well as a handle, making it easy to press soil. This method helps cut down on plastic waste in your garden.

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PREMIUM SILICONE: Square mold crafted from premium food grade silicone, not easy to deform, can be used repeatedly, flexible, easy release, easy to clean and store

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Square Silicone Candy Molds - Mini Silicone Molds for Hard Candy, Chocolate, Gummy, Caramel, Ganache, Ice Cubes (1)
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Got 1 pc silicone mold, 126-Cavity, each cavity: 2 ml, 0.6 inch x 0.6 inch x 0.4 inch

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Seed Starter Tray, 48 Cells Indoor Seed Starter Kit, Flexible Silicone Designed Seedling Starter Trays, Germination Tray with Humidity Dome & Lids(4in Height), Reusable & Dishwasher Safe, BPA-FREE
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STURDY AND REUEABLE: The bottom of this seed starter tray is designed with silicone, which is flexible and can be popped out. The whole seedling and the roots will be transplanted out intact without affecting the roots.

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10. Cookie Cutter Soil Blocker

Ten cookie cutter soil blockers arranged on a wooden workbench with soil and seedlings nearby.

You can use cookie cutters made of metal or plastic to shape soil blocks for seed starting. Press the cutter firmly into a tray filled with compacted soil mix, then lift it out to get clean, shaped blocks. This method adds a simple and creative way to make soil blocks.

11. Heavy-Duty Metal Tube with Compacting Plunger

A metal pipe with a plunger-style press for making soil blocks on a wooden workbench with soil and small soil blocks.

You can use a sturdy metal tube paired with a plunger made from wood or metal. This setup gives you strong, well-shaped soil blocks. The plunger helps press the soil firmly, making it easier to form consistent blocks. This method works well if you want a long-lasting tool with precise results.

12. Lego-Inspired Soil Block Maker

A set of 12 colorful Lego-style soil block molds on a wooden table with soil inside some blocks and gardening tools nearby.

You can use large Lego-style molds to create even soil blocks for your garden. These blocks stack neatly and work well for starting seeds. This method adds a playful touch you and your kids can enjoy while gardening.

13. Small Yogurt Cups with Drain Holes

A small yogurt container with drainage holes filled with soil, placed on a neutral surface.

You can use old yogurt containers by making small holes in the bottom for water drainage. This helps air circulate and prevents water from pooling around your seedlings. These small containers are perfect if you want an easy and affordable way to start plants in a limited space.

14. Tin Foil DIY Soil Mold

Close-up of a tin foil mold used for making soil blocks, surrounded by soil and gardening tools on a wooden surface.

You can shape tin foil into a simple soil mold that fits your seedling needs. This method lets you create custom sizes and forms easily. It is light, affordable, and can be reused or thrown away after use, making it an adaptable choice for your gardening projects.

15. Using a Measuring Cup and Press

A measuring cup with a plunger filled with soil, set against a blurred garden background.

You can create uniform soil blocks using a measuring cup and a small press or spoon. This setup helps you keep the same amount of soil in each block, promoting even seed growth. These items are easy to find and clean, making the process simple and efficient.

16. Cardboard Tube Seed Block Mold

Close-up of cardboard rolls and soil blocks on a wooden table with gardening tools and green plants in the background.

You can use short sections of toilet paper or paper towel tubes as molds for soil blocks. Just fill the tube with moist soil and press it gently to shape a block. Afterward, plant the whole tube in your garden. This method is simple and helps reduce waste.

17. Simple Wooden Dowel Press with Base

Close-up of a wooden dowel pressing soil into a block on a wooden base.

You can build a soil block press by attaching a wooden dowel to a flat base. This setup lets you press soil into firm, even blocks easily. It works well with most soil mixes and holds up with regular use.

Using this press, you avoid plastic pots while starting seeds. The process saves you money and reduces waste.

Here’s what you’ll need:

  • A sturdy flat board as the base
  • A wooden dowel, securely fixed upright
  • Moist soil mix

To make blocks, pack moistened soil around the dowel and push it into the base. The soil will form compact blocks that are good for seed roots. This method is simple, effective, and perfect whether you are new or experienced in gardening.

 

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Rosy Soil Seed Starter Soil Mix - Organic Peat-Free Seedling Soil w/Worm Castings, Biochar, Mycorrhizae for Seed Germination, Microgreens, Propagation, Herbs, Vegetables, Flowers, Cuttings - 4qt
Rosy Soil Seed Starter Soil Mix - Organic Peat-Free Seedling Soil w/Worm Castings, Biochar, Mycorrhizae for Seed Germination, Microgreens, Propagation, Herbs, Vegetables, Flowers, Cuttings - 4qt

BUILT FOR GERMINATION AND EARLY ROOT GROWTH: Rosy Soil seed starting soil is specifically formulated for the most critical window in a plant's life — when seeds first sprout and roots begin to anchor; balanced aeration, drainage, and moisture retention give seedlings exactly what they need to establish strong, healthy roots from day one

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Karissa Garza Avatar

Lori G. Garry

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I’m the creator of Ceiloria, where I share home decor inspiration based on over five years of hands-on experience decorating and refining real living spaces. My goal is to help you explore simple, practical design ideas that work for everyday homes.

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