Nutrient deficiencies
https://www.project-springtime.org/research/deficiencies/
| Symptoms | Suspected Element | ||||||||||
| N | P | K | Mg | Fe | Cu | Zn | B | Mo | Mn | Over Fertilization | |
| Yellowing of Younger leaves | ✔ | ✔ | |||||||||
| Yellowing of Middle leaves | ✔ | ||||||||||
| Yellowing of Older leaves | ✔ | ✔ | ✔ | ✔ | |||||||
| Yellowing Between veins | ✔ | ✔ | |||||||||
| Old leaves drop | ✔ | ||||||||||
| Leaf Curl Over | ✔ | ||||||||||
| Leaf Curl Under | ✔ | ✔ | ✔ | ||||||||
| Leaf tips burn, Younger leaves | ✔ | ||||||||||
| Leaf tips burn, Older leaves | ✔ | ✔ | |||||||||
| Young leaves wrinkle and curl | ✔ | ✔ | ✔ | ✔ | |||||||
| Dead areas in the leaves | ✔ | ✔ | ✔ | ✔ | ✔ | ||||||
| Leaf growth stunted | ✔ | ✔ | |||||||||
| Dark green/purplish leaves and stems | ✔ | ||||||||||
| Pale green leaf color | ✔ | ✔ | |||||||||
| Leaf Spotting | ✔ | ||||||||||
| Spindly | ✔ | ||||||||||
| Soft stems | ✔ | ✔ | |||||||||
| Hard/brittle stems | ✔ | ✔ | |||||||||
| Growing tips die | ✔ | ✔ | |||||||||
| Stunted root growth | ✔ | ||||||||||
| Wilting | ✔ | ||||||||||