Plant Nutrition
In aeroponics, your nutrient solution is everything your plant eats and drinks. Getting it right means faster growth, better flavour, and healthier plants. Getting it wrong is the most common reason towers underperform.
Every plant nutrient product lists an NPK ratio — Nitrogen (N), Phosphorus (P), and Potassium (K). These are the three macronutrients that plants need in the largest quantities.
For leafy greens and herbs — the most popular crops in an Urbanvana tower — you'll typically stay on a high-N grow formula for the entire lifecycle. Fruiting plants like tomatoes and chillies need a bloom formula once they start flowering.
pH controls which nutrients your plant can absorb. Even if your solution contains the perfect nutrient mix, if pH is outside the ideal range, plants can't access them — a condition called nutrient lockout.
Target range: pH 5.5–6.5 (ideal: 5.8–6.2). Below 5.5, some nutrients become toxic. Above 6.5, iron, manganese, and zinc become unavailable.
Check pH every 2–3 days. Most Indian tap water runs pH 7–8, so you'll almost always need pH Down. Add it slowly — a small amount goes a long way. After topping up the reservoir with plain water, always re-check pH as it will drift upward.
TDS (Total Dissolved Solids, measured in ppm) or EC (Electrical Conductivity, measured in mS/cm) tells you how concentrated your nutrient solution is. A cheap TDS meter (₹200–500 online) is one of the most useful tools a tower grower can own.
If TDS is too high (over-concentrated), dilute with pH-adjusted water. If too low, add more nutrients. Change the reservoir completely every 2–3 weeks to prevent salt buildup.
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