Petunia fertigation tips.
• Give fertilizers with every watering . • Do not use 15-15-15 or 17-17-17! • Do not use ureum (NH 2 ) 2 CO! • Do not use clean water (without fertilizers). • Do not use dry fertilizers
• Suitable NPK rate after transplanting : 15 -5- 15, 15 - 3 - 15, 15 -5- 10, 18 -5- 15, 17 -5- 17 – vegetative PNK. • Suitable NPK rate at flower bud emergence : 15 -5- 25, 15 - 3 - 25 15 -5- 30, 18 -5- 35, 17 -5- 40 – generative NPK. • Do not use too much phosphorus!
Time to change
Vegetative NPK
Generative NPK
( 17 -5- 40 ) N < K
( 17 -5- 17 ) N ≈ K
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