Orange lemon Green House seed

I'd wager too much P. The first pic does make me thinkg K-deficiency, but this usually has some spots as it progresses and the progression from other 2 pictures is not quite right, either. Too much p can also cause the burning around serated tips (the outside of leaf finger). If new growth is also a lighter green, i'd be even more confident it is P-tox. Too much sulfer is also in the ream of possibilities. if new growth is a normal green, i'd lean this way. As i think about it more, i'd wager S-tox between the two. A P-tox has a much higher chance of locking other things out, so you'd see more than 1 symptom in some p-tox cases.

Zinc deficiency. A dose or three of a soluble trace element/mineral mix should do the trick. Would be available from any decent garden centre.

Maybe Potassium? Use a leaf chart to help determine the origin, It will depend if its on new growth or old as that signifies mobile or immobile nutrient. and this is asumeing PH is on point and not off imitating a deficiency. https://420life.com/wp-content/uploads/2021/10/Marijuana-Leaf-Deficiency-Chart-scaled.jpg Good Luck!