I've been using poppy seed tea on and off for a long time, I am always looking at the state of the seeds. Greyish colour have been washed and not good for doing tea.
The best quality seeds are sourced from Australia (Tasmania) and are dark black as opposed to greyish, onto the pods if you have a good batch just empty shaken seeds in the garden and you will see sprouts in no time. Here in Australia Tasmanian seeds are the best as they grow them down there for the pharmaceutical mob. Always going to be a hit or miss however with a mad batch of seeds you will have the poppys you are seeking, be careful with this shit as it can be useless but also with the right seed be as potent as fentanyl. Last harvest I did wity poppy garden was well worth the wait! The pods vs the seeds are much different the pods completely fucked me up so be careful to not over do it, my best advice on this topic would be light yellow is the weak brew the darker the tea the more potent. Point being is look for Australian seed, never buy them from a grocery store or an Asian/Indian type of place. Go to a wholesale place check the quality and after you've brewed a tea throw washed seeds in the garden and you will have your opium poppys in no time. Just remember that it's never a uniform consinsticy unless you have a good look at the seeds. What you are looking for are the darkest ones and straight up ask where they have sourced them... If they say Australia you have a winner.
Best of luck with this and don't jump in the deep end straight away.