Would you recommend using any type of product? It's my first time growing. It's an autoflowering and it's the 4th day since I planted it in the pot.

Still nothing, it's a very small autoflowering. But if you wanted to add something like flavonoids/rooting agents, those are additives that help the roots grow more vigorously! In my case, I use Top Crop Deeper Underground.

Hey buddy. Check out my diaries; I only grow autoflowering plants. I water them with a small amount until the third week. When they grow, I start adding 1 ml of NPK fertilizer for vegetables per liter of water. At first, very little; when they start to flower, you can give them a flowering product. I use Advanced Nutrients Sensi Veg A+B and Sensi Bloom A+B. I also use a supplement called BIG BUD from Advanced Nutrients. Check the amounts and the size of my plants for reference for yours. Good luck, bro! At first, give them very little water and only when the surface dries out again. 150 ml each time, be careful not to drown the little plant.

At this stage, give it some roots enhancers, to stimulate the roots growth.

grow photos in future and go soilless. Shorter learning curve. brand of products is mostly irrelevant. Being able to adjust ratio and concentration of nutrition to grow a healthy plant is all that is necessary. A good setup has 3-4 products that will allow you to provide a proper formula of nutrition for all stages of life. If you go soilless, can be given very specific instructions that will have consistently predictable results. Soil has more unknowns. Doesn't make it better or worse, just means there's more variability in any 1 person's experience. Just keep it healthy and you'll be fine... even if oyu don't you'll still have a decent harvest more times than not.. seen many canopies that were well-beyond normal damage and still produce an okay harvest -- in other people's diaries not my own grows, BWAHAH.

I wouldn't use fertilizers yet, especially since it's an autoflowering and only 4 days in the pot. Right now, the most important thing is not to overwater it, give it good light, and let it develop strong roots. 🌱 If the substrate already comes prepared with nutrients, you have food for the first 2-3 weeks without any problem. Later on, you could start with a very light dose of growth nutrients, but for now, less is more with autos. The seedling looks healthy, just try to water in small circles around it and not soak the entire pot to avoid excess moisture. Happy Growing Growmie! 🌱