help

Doesn't look like any one issue, what are you feeding them and how often? Some of it can be explained by training damage the yellow tips tho can be a nutrient deficiency. Plant looks healthy tho.

No plant will ever have 100% perfect leaves, 100% of the time.........

You should get good results but watch out how much nuts your putting as the plan is young and in grow phase you should add less nuts. Please see below EC guide Perfect EC level for cannabis plants is around 0.5-0.8 until around 13/15 days after germinating. This should be progressively increased to 1.1 towards the end of the growth period. During the bloom stage you’ll need to increase this, as your plants will need more nutrients. You should keep the EC between 1.2 and 1.5, keeping it there until the fattening period, where you should increase it to 1.8/2.1 – this is the highest it should ever be. Remove If you using LED get free APP to measure LED Lux ( https://play.google.com/store/apps/details?id=com.doggoapps.luxlight&hl=en_GB&gl=US&pli=1 ) Light • Clone and seedling stage: 5,000–7,000 lux • Vegetative stage: 15,000–50,000 lux • Flowering stage: 45,000–65,000 lux Ph Soil pH range: 6.0–6.ph. 6.5ph is sweet spot Temp Temperatures of around 20-25ºC with a humidity level around 65-70% gives good results for cannabis seedlings. Humidity levels around 60-70% deliver solid veg growth. 50-60% in flowering and last two weeks 40-50%