AMG GT-Balcony

Temps plummeted this week to 25°C with cold nights of 14-15°C. One night temp dropped to 11°C. It felt like early winter. I'm hoping this will change in the upcoming days as it's raining every days for at least few hours. Totally crappy weather with no sunshine. The plant growth kinda stalled. Don't know what's that all about. pH levels are normal. One plant is at ph 6.0-6.2 and the other at pH 6.8-7.1. They wont budge out of that range even thou I water them with solution of pH 6.5. One thing I also noticed is that bottom leaves are yellowing and falling of. It looks like N deficiency. Leaves slowly turn yellow and when there is no green on them they fall off. Those are mostly the bottom ones and the ones inside the canopy. I'm giving them prescribed doze of Easy Grow. 1 tablet in 4l of water and give each plant 2l. Perhaps Easy Grow is not enough at this stage and the downside is that I only got 3 tablets left. That's about for 3 more weeks of feeding. I should continue with Fish-Mix after I run out of tablets so the plants don't starve out. cya all next week.