Tomato nutrient sufficiency ranges
| Plant Part | Time of Sampling | N | P | K | Ca | Mg | S | Fe | Mn | Zn | B | Cu |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Percent (%) | Parts per Million (ppm) | |||||||||||
| Most recently mature leaf |
5-leaf stage | 3-5 | 0.3-0.6 | 3-5 | 1-2 | 0.3-0.5 | 0.3-0.8 | 40-100 | 30-100 | 25-40 | 20-40 | 5-15 |
| First flower | 2.8-4 | 0.2-0.4 | 2.5-4 | 1-2 | 0.3-0.5 | 0.3-0.8 | ||||||
| Early fruit set | 2.5-4 | 0.2-0.4 | 2.5-4 | 1-2 | 0.25-0.5 | 0.3-0.6 | 40-100 | 30-100 | 20-40 | 20-40 | 5-10 | |
| First ripe fruit | 2-3.5 | 0.2-0.4 | 2-4 | 1-2 | 0.25-0.5 | 0.3-0.6 | ||||||
| During harvest period | 2-3 | 0.2-0.4 | 1.5-2.5 | 1-2 | 0.25-0.5 | 0.3-0.6 | ||||||
| 1 The sufficiency ranges provided are to be used as a reference and a guideline only. | ||||||||||||
| Adapted from Maynard, D.N., and G.J. Hochmuth. 2007. Knott’s Handbook for Vegetable Growers. 5th edition. John Wiley & Sons, Inc. New York. | ||||||||||||