I have soaked seeds in a weak peroxide water solution and water only solution, with the former yielding the best results. I've soaked them in a weak humic acid solution and a weak seedling fertilizer too. They did no better than peroxide and water and were much more expensive. Once a seed shoots out its little white tail, I usually plant it. Rarely do all of them pop at the same time; although, I have had a few pods where all but one would germinate around the same time. Also, I have heard of this lazy ass guy who actually let his seeds soak in a peroxide and water solution so long until they actually grew their first leaves! Personally, I would never be that lazy or ignore seeds on my counter that long, so this is what I've ¨heard¨