How to apply Spiragro: a practical guide for growers

Spiragro: advanced biostimulation to boost crop performance

Spiragro is a natural microalgae‑based biostimulant that improves crop quality, strengthens resistance to water stress, and enhances nutrient efficiency. Backed by validated results from the LIFE ALGAR‑BBE European project, more growers are relying on Spiragro as a key tool for more efficient and sustainable agriculture.

Recommended dosage by crop type

1. Leafy vegetables (lettuce, spinach, arugula)

• Dose: 2–3 L/ha
• Optimal timing: After transplanting and mid‑cycle
• Benefits:
  • Increased vegetative growth
  • Better tolerance to water stress
  • Lower losses due to dehydration

2. Tomato, pepper, eggplant

• Dose: 3–4 L/ha
• Application:
  • First at fruit set
  • Second during fruit enlargement
• Benefits:
  • Better size and uniformity
  • Improved firmness and shelf life
  • Higher water‑use efficiency

3. Zucchini, cucumber and other cucurbits

• Dose: 3 L/ha
• Timing: At flowering and every 15–20 days
• Benefits:
  • Yield increase
  • Reduced deformities under stress

Best application practices

• Application method: Preferably through fertigation.
• Compatibility: Compatible with most fertilizers and crop protection products.
• Ideal conditions: Early morning or late afternoon.
• Frequency: Every 15–20 days during stress periods or high physiological demand.

Evidence‑based results

Field trials within LIFE ALGAR‑BBE have shown:

• Yield increases of 10–18% in horticultural crops
• Better tolerance to water stress
• Improved final product quality (size, firmness, color)

Final thoughts

Spiragro is a scientifically validated, natural solution that helps growers improve performance and crop quality. Integrating it into the fertigation plan assures better results even under difficult environmental conditions.

If you need crop‑specific recommendations, the Neoalgae team can assist you.