Debut de Sem 5 Ca pousse!! de 25cm à 45 cm selon la plante....ca commence a sentir bon j'ai hate de voir la suite....ph ajuste a 6 que des nutriment de zamniesia.... elle on l'air d'allez trés bien...
That wrinkle could be related only to 3 things
Heat inside of grow room, could be
Nitrogen excess , most likely
Wind damage , could be.
Has nothing to do with calmag.
@Cookies67, i put a follow up, you had to see. If see wrong, ill text.
Your leaf colour is good, maybe leaf stems too long, could indicate weak light, if sets of fingers will stay 3 or 5 on leaf, then obviously miss light intensity.
@Cookies67, wind should be in intervals, i use same timer as for light, just here i put 50min of work 10 off and repeat it during all day. plus its oscillating fan, thats very important. direct not moving wind can do and will do damage.
If soil is hot ( your plant is showing maybe that sign of curling down leaf ) you just dont feed. Most soils are preloaded, will last easy 3-4 weeks. Plain phed water in such cases, no feeding added.
Your temps are now perfect.