Germination speed mainly depends on the temperature of your room. The warmer the environment, the faster the germination. The best average temperature to grow your plants is 18 to 24C (64 to 75F).
Usually it takes 1 to 2 weeks to germinate. Some plants such as tomato, chili pepper and rosemary may take up to 3 weeks. The lettuce plants are very sensitive to high temperatures so their germination might be inhibited by that.
You will find the most precise details from your plant pod package as well as from our plant list here.
Please make sure you keep the transparent germination domes on the pods until the sprouts reach them.
If your plants have not sprouted after 3-4 weeks, then do get in touch with our support with some photos of your pods and they will be able to help you out.