Light, nutrients & watering basics

When it comes to indoor gardening, mastering the basics of light, nutrients, and watering can make or break your grow. Light is your plant’s food source—without enough of it, growth stalls. Most indoor growers rely on full-spectrum LED grow lights, which are energy-efficient and produce little heat. For best results, place the lights close enough to reach your plants but not so close that they cause burn. Adjust the height as your plants grow and follow a consistent light schedule (like 18 hours on, 6 off during veg).

Just like humans need vitamins, plants need nutrients—especially when growing in soil or coco. The three key nutrients are nitrogen (N), phosphorus (P), and potassium (K), usually labeled as NPK on fertilizer bottles. In the vegetative stage, your plants crave nitrogen for leafy growth. During flowering, phosphorus and potassium take the lead to support buds or fruit. Always follow the feeding schedule on your nutrient bottle and avoid overfeeding, which can cause “nutrient burn.”

Watering may seem simple, but it’s often where beginners trip up. Overwatering is a common mistake and can suffocate roots or invite root rot. Only water when the top inch of your soil feels dry, and always ensure your pots have drainage holes. In hydro systems, monitor water levels and keep pH balanced—around 6.0 for soil and 5.5–6.5 for hydro setups.

Also, pay close attention to your water’s pH and quality. Unbalanced pH can lock out nutrients, even if you’re feeding correctly. Use a pH meter and adjust with pH up/down solutions as needed. With consistent care and observation, your plants will thrive under the right balance of light, food, and hydration.

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