We regularly test all our seeds to ensure we always have the fullest confidence in their viability. We've found the three biggest causes of poor germination to be the following: Poor Storage Seeds will last significantly longer stored dry in your fridge (in an air/moisture sealed container - or ziplock bag like we send all our orders in). Over/under watering Watering too much or two little can be an early kiss of death to seeds, killing them before they've even visibly come to life. Try to maintain consistent moist soil whilst they are germinating and avoid extreme dry or wet. Tiny light loving seeds Some of the hardest to germinate seeds are the tiny light loving type species. They simultaneously need light (so cannot be covered or they won't germinate), but also cannot be left to dry out. See our Top 5 Germination Tips post for more hints on germination light lovers in particular!