The Dypsis psammophila seem much happier now that I have ceased removing the lid of the germination box for extended periods. They continue to grow at a steady pace and the leaves are looking a little more green and glossy. I will be introducing a new misting system before October, which will be a better time to try the Dypsis psammophila outside of the germination box, as there will be less difference in humidity. No more seeds have germinated, despite the better temperatures, but whilst I am becoming doubtful of any further germination, I am quite happy to leave the potted up seeds as they are, until they become an inconvenience.