It has been a long time with no roots growing. #2 grow roots within 7 days.
Internet says garlic germinate around 10 to 20C, and will not sprout if temperature above 25C. #2 which germinated within 7 days was put at the balcony, which is much hotter than indoor temperature.
I will experiment putting a few cloves at the balcony to see if it makes any difference.
