*Soilless cultivation medium *No messy coco peat *No chemical additives *Protects vegetable seedling roots *Very easy to use *Provides ease of breathing and rapid germination Description: Perfect for indoor/outdoor gardens and farms as well as hydroponics and greenhouses. Saves time and effort and is easy to use. Works for most seeds, such as lettuce, leafy greens fruits, beans, vegetables, and ornaments. Made of environmentally friendly material. Easy to clean and corrosion-resistant, the roots grow through the mesh fabric for better breathing and growth. >>> Dimensions: Each small Sponges size is about 25*25*25mm. They will fit 1.8" and 2" Mesh net pot baskets.1pc whole sponge which has 100pcs small sponges. >>> Hydroponics Tips: Before using the sponge, please soak them for 1 - 3 hours and squeeze out the water. Rinse and hydrate the sponges back. Germination for most seeds should be kept away from the light. After the seeds grow 4-5 leaves, usually after 15 days, you can move them to the net cups pots. >>> Why Start Seeds on Sponges? You don’t need messy soil or coco peat. You can watch the seeds grow and roots develop. Sponge seed germination happens rapidly. It’s easy to sprout a lot of seeds in a small space. The sponges can be reused if seeds turn out to be unviable. It makes a great experiment for children. >>> Here are some great plant choices for seed rowing on sponges: Lettuce Pak Choy Basil Rosemary Watercress Carrots Mustard Radish Herbs Tomatoes and many more... >>> How to Plant Seeds in your Sponge First, you may want to treat the sponges with diluted bleach to prevent mold growth but rinse them thoroughly if you do. Use the sponges whole or cut them into smaller squares. Soak the sponges in water and place them in a shallow tray. Cover the tray in plastic wrap and put it in a warm location. >>> Check under the plastic wrap occasionally to make sure there are no molds growing and that the sponges have not dried out. Give the sponges a regular mist of water to keep them moist but not soaking wet. >>> To transplant your sprouted seedlings, either remove them entirely and place them in a pot or outdoor bed when ready or place the entire sponge in a net pot ready to use for your hydroponics system. Once they’re big enough, you can also use sponge-grown seedlings as you would any seeds you started in soil.