chasv77answered grow question 5 years ago "soil really hard" - Is she draining properly? IF you stick your finger in the soil down to second knuckle, is it cool but not damp?
Can't stick your finger that far down, then compaction is a problem I believe. Quality soils have some sort of dolomite or perlite that help keep the soil loose.
I see those are smart or air pots? Maybe they are allowing too much air drying out the soil from the side as well?
I run fabric pots, and have to water every 3-4 days, due to evaporation from the pots acting like wicks, drying them faster, than plastic.