Instructions for Rhubarb Leaf Stepping Stones

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Rhubarb leaf stepping stones add interest and texture to any path in your garden. The large leaves with their veins, texture and shape make the ideal form for creative stepping stones. Rhubarb (Rheum rhaponticum) grows in U.S. Department of Agriculture plant hardiness zones 3 to 8. The leaves of rhubarb contain oxalic acid, making them unsafe for human consumption but ideal for garden projects.

Stepping Stone Setup

Assemble all of your supplies in an outside area with plenty of room to work. Plan to make your stepping stones during temperate, dry weather so the fast-setting concrete mix hardens properly.

Things You'll Need

  • Play sand
  • Large, plastic container about 4 inches deep
  • Plastic wrap or thin plastic sheeting
  • Fresh-cut rhubarb leaf
  • Ruler
  • Rubber gloves
  • Face mask
  • Fast-setting concrete mix
  • Measuring cup
  • 5-gallon bucket
  • Trowel

Step 1: Prepare the Container

Pour play sand into a large plastic storage container to a depth of 3 inches. The container needs to hold your flattened rhubarb leaf with a few inches all the way around it to the edges. It also has to hold the sand, so choose a container at least 4 inches deep.

Tip

  • Under-bed storage containers work well. The long kind might have room for two leaf molds at a time.

Step 2: Start the Mold

Wet the sand to slightly dampen it. This helps it hold together better for creating a form. Place large plastic wrap or other very thin plastic sheeting over the sand. Put your rhubarb leaf top down on top of the plastic and spread it flat.

Step 3: Create the Form

Push the leaf -- gently so it doesn’t tear -- into the sand. Move the sand with your hands until the leaf measures about 2 inches into the sand. This creates a form for your stepping stone.

Step 4: Don the Protective Gear

Put on rubber gloves and a face mask. Getting the concrete mix out from under fingernails is a chore avoided by wearing the gloves. The concrete will send up dust when it is poured that you don't want to breathe.

Step 5: Make the Mix

Measure about 8 to 12 cups of the mix into the bucket and slowly add water while mixing with the trowel. Mix and add water until it has a toothpaste-like consistency.

Tip

  • Approximately 8 cups will cover a smaller rhubarb leaf up to about 8 inches long, while 12 cups should cover a large one. It’s better to not mix enough, and make a little more, than to make too much and waste supplies.

Step 6: Make the Stone

Scoop the the mix onto the center of the leaf. After each scoop, spread it with your -- still gloved -- hands. Continue to scoop and spread, working your way to the outer edges of the leaf. Fill the sand form to the level of the surrounding sand.

Tip

  • Spraying the rhubarb leaf with cooking spray will help it release from the stepping stone.

Step 7: Allow it to Set

Allow the rhubarb stepping stone to set for at least two days. Remove it from the mold and pull the leaf off of the stone.

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