To give your seeds the best chance of success, use a seed propagation compost; this has a fine texture that draws up moisture by capillary action right to the surface of the tray or pot. As salts may damage seedlings, seed compost is low in nutrients. A standard seed mix contains 2 parts loam, 1 part peat substitute (or peat), and 1 part sand, with ground limestone and superphosphate of lime.

There are also root cutting composts available for use in high-humidity environments. These have a high ratio of coarse sand to promote efficient drainage. Perlite may also be added to increase aeration and drainage.