Unhappy plants

[Roberto4536]

Hello there i really need your help i have this plant here its been 17 days since i put it on a 15 liter pot i keep the ph on the water 5.8-5.9 and the growth is extremely slow

[Xena]

If it’s in soil that ph is too low

[Roberto4536]

Its in canna coco

[Roberto4536]

Do you think it could be phosphorus problem cause thats what im thinking?

[OldManGrower]

Regardless of the medium, the PH is too low. This may also be causing problems with calcium/magnesium/iron up take. Raise the PH to 6.2-6.8

[OldManGrower]

Also, give it a dose of CAL-MAG.

[Roberto4536]

My tap water is hard so cant be calmag

[9fingerleafs]

Probably The EC is too high. I would reduce nutrients by a quarter, nutrient lock out its called

[BudzPow]

If I'm not mistaken the pH should be around 6.3 for the plant to utilize calcium correctly. If that's the case it could very well be Cal/Mag deficiency even with hard water. I'm on my first grow however so I'd wait for someone more experienced to answer ^^.