The CBD Nordle struggled with pH last week. I took a soil pH and both plants averaged ~7.4. I haven't seen any issues with the Blueberry so far but used nutrients high in sulfur in order to bring the pH down as well as adding phosphoric acid to the nutrient solution to get it to a pH of 5.5. I have also been removing nodes on the bottom half of the plant as they get large enough.
Let there be life. Off to an amazing start. Keep up the wonderful progress. I hope for a strong happy and healthy grow. Good luck stay safe happy growing cheers!!!!