Cover the spider plants with a piece of clear plastic. Secure the plastic to itself with masking tape or weight it to the ground with rocks. The plastic protects the plant from the homemade herbicide without depriving it of sunlight. Do not cover the plants with dark or black plastic.
Create a mixture of 3 cups pickle juice, 1/4 cup table salt and 3 tablespoons lemon juice in a plastic spray bottle. Shake the bottle to mix the ingredients.
Spray the mixture directly onto the grass, not the soil underneath. Choose a day that is sunny and has no rain in the forecast for at least two to three days.
Allow the mixture to penetrate the grass for 12 hours before removing the plastic from the spider plant to allow it to breathe.
Reapply the homemade herbicide to the grass 24 hours after the initial application. Once the grass is dead, cover the ground with a 2 inch layer of mulch to discourage new growth.