How to Make Rock Decorations from Hypertufa

Is it easy to make artificial rocks on your own? I get asked this question quite often. The truth is, if you’re not planning to build large rocks, you can easily do this project yourself.

In this post, I’ll reveal some of the secrets of our work and show you how to easily and enjoyably create garden rocks on your own. If you don’t want to strain your back by hauling field stones into your garden, or drain your bank account with purchases at specialty garden stores, the simplest method is to roll up your sleeves and build artificial rocks with your own hands. At the same time, you can let your artistic side shine a bit and create exactly the shape of boulders you’re looking for.

The simplest DIY method for making garden rocks is to use what’s called *hypertufa*. Despite its rather exotic name, it’s a term for a mixture of cement, aggregate (such as sand or gravel), and peat.

Using this mixture yields very interesting results:

1. Without using artificial dyes, you can achieve shades of dark brown and red that look very natural

2. Rocks, planters, simple sculptures, and other garden decorations made from this material tend to naturally become covered with lichen. An aged effect is achieved very quickly.

3. Peat makes our creations much lighter than if they were made entirely of concrete

To create decorations from hypertufa, you can use pre-made molds made of cardboard, aluminum foil, or Styrofoam. You can use many commonly available materials that you happen to have on hand to shape the pieces.

How to Make Artificial Stone from Hypertuff.

In these few simple steps, I’ll try to show you how to properly get started on your garden decorations.

1. Prepare a mold that will be used to shape the artificial stone. Ideally, this should be a box roughly the same size as what you want to make. You can use containers made of cardboard, Styrofoam, or wood. Line the inside of the container with old newspapers and pieces of irregularly broken Styrofoam. The goal is to achieve an uneven shape that resembles a stone. Cover the prepared mold with crumpled aluminum foil and tape it to the edges of the box. You can also line the inside of the mold with plastic wrap or old canvas.

2. Put on rubber gloves

3. Dry-mix three scoops of aggregate (perlite, gravel, or sand), three scoops of peat, and two scoops of cement—preferably Portland cement. The mixture is ready for water once it becomes uniform. Slowly add a small amount of water and mix. Be careful here—if you add too much water, the mixture will be unsuitable. Stop adding water when the consistency of the mixture resembles thick dough. The finished mixture should be malleable; when it is, it’s ready.

4. Pour the prepared mixture into the mold to a thickness of about 5–8 cm; spread the rest by hand along the sides to a minimum thickness of 4 cm. Our stone will be hollow inside. If the mold is completely filled to the brim, it will prolong the cement setting process. The center of the stone can be filled with Styrofoam to prevent the material from falling away from the sides.

5. Leave the *hypertuf* stone for 24 hours to allow the cement to set. After this time, turn the mold upside down and remove the artificial stone. Remove any imperfections with a stiff brush. Once you’re satisfied with the final result, wrap the stone in plastic wrap and leave it that way for 2–3 weeks so that the cement in the *hypertuf* can set completely without interference.

6. After 2–3 weeks, remove the stone from the plastic wrap and rinse it with water at a moderate pressure, preferably from a garden hose. During rinsing, any loose parts that did not set properly may fall off.

List of materials needed to make an artificial stone

• A box or container made of cardboard or Styrofoam

• Aluminum foil or canvas

• Rubber gloves

• A small bucket for mixing the material

• A spatula for mixing the material

• Sand, gravel, or perlite

• Peat

• Portland cement

• A stiff-bristled brush

It’s best to start by building small rocks.

This will help you get a feel for how the material behaves and what the production process looks like.

Try using glass fiber mesh (plastering mesh), which can be embedded in the fresh material. This will serve as reinforcement and provide strength. It’s also worth reading about how to build a foundation and applying that knowledge when constructing garden stones.

You can adjust the recipe and experiment with different ingredient ratios to achieve interesting effects that influence the stone’s final appearance. For example, using equal amounts of each ingredient results in a stone that resembles sandstone.