The Experimental refill for Smart Garden contains an advanced version of the Smart Soil that stimulates the growth and growth of every plant you want to experiment with, all you need to do is place the seed in the ground and click on the refill. Compared to ordinary potting soil, the Click and Grow Smart Soileen offers much better environment to germinate with more oxygen, water and nutrients. Experiment, enjoy, grow! The Click and Grow Experimental refill does not contain GMOs, pesticides, fungicides, insecticides, plant hormones or other suspected substances. Nature at its purest.