Autos transplant

it's crucial to transplant them when they are still young but have developed a strong root system. This is typically when the seedlings have 3-4 sets of true leaves, which is usually around 2-3 weeks after germination. Gradually acclimate the seedlings to outdoor conditions over a week. Start by placing them outside for a few hours each day, increasing the duration and exposure to direct sunlight gradually. Select a location that receives at least 5-6 hours of direct sunlight per day, ideally more. Ensure the soil is well-draining and rich in organic matter. If necessary, amend the soil with compost or other organic materials to improve its quality. Water the newly transplanted seedlings immediately after planting to help settle the soil around the roots and provide initial hydration. If the weather is very sunny or windy, consider providing some shade or wind protection for the first few days after transplanting.

At work we move seedling autos outside to the greenhouse after they're about a week old. I wouldn't move them into full sun that young but they can take it at a fairly early stage. If you wanna change pots, do it before flowering starts.

End of veg. When the plant are growing root balls over the soil. It is telling that want more space.