𝐑𝐞𝐝 & 𝐁𝐥𝐮𝐞 𝐋𝐢𝐠𝐡𝐭: 𝐌𝐨𝐫𝐞 𝐓𝐡𝐚𝐧 𝐉𝐮𝐬𝐭 𝐏𝐡𝐨𝐭𝐨𝐬𝐲𝐧𝐭𝐡𝐞𝐬𝐢𝐬

A recent review shows that it’s not just about giving plants “light” — the 𝐫𝐞𝐝:𝐛𝐥𝐮𝐞 𝐫𝐚𝐭𝐢𝐨 in your LEDs actively shapes growth and quality.

🔴 𝐑𝐞𝐝-𝐞𝐧𝐫𝐢𝐜𝐡𝐞𝐝 𝐥𝐢𝐠𝐡𝐭 → stimulates stem elongation and flowering, increases chlorophyll.

🔵 𝐁𝐥𝐮𝐞-𝐞𝐧𝐫𝐢𝐜𝐡𝐞𝐝 𝐥𝐢𝐠𝐡𝐭 → reduces stem elongation, resulting in compact, sturdier plants; boosts photosynthesis efficiency; enhances stomatal opening and secondary metabolites (antioxidants, anthocyanins).

✅ 𝐏𝐫𝐚𝐜𝐭𝐢𝐜𝐚𝐥 𝐭𝐚𝐤𝐞𝐚𝐰𝐚𝐲𝐬:

• Fine-tune red:blue ratios to balance plant architecture and nutritional value.

• More red → elongation and flowering control.

• More blue → compact plants, higher antioxidant content, better shelf life.

🔎 𝐀𝐭𝐭𝐞𝐧𝐭𝐢𝐨𝐧: These light effects represent the main trends. Species may respond differently, but it’s worth experimenting and testing.

💡 LEDs aren’t just a light source — they’re a growth strategy for producing 𝐡𝐢𝐠𝐡𝐞𝐫-𝐯𝐚𝐥𝐮𝐞 𝐜𝐫𝐨𝐩𝐬 that stand out in the market.

👉 Are you adjusting red:blue ratios in your greenhouse or indoor farm?

📚 Source: Trivellini et al. (2023). The Role of Blue and Red Light in the Orchestration of Secondary Metabolites, Nutrient Transport and Plant Quality. 𝑃𝑙𝑎𝑛𝑡𝑠 2023 May 18;12(10):2026

Dr. Michele Grieco turned his plant biology expertise into Plant Monitor - affordable monitoring apps bringing research-grade measurements to small greenhouses and vertical farms.

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