Do the leaves have burnt blotches on them?

  Added by: Nietzsche  Last edited by: Nietzsche  Viewed: 150 times   Rated by 8 users: 8.14/10
pH Fluctuation

Both of these leaves in figure 6 and figure 7 are from the same plant. It could be over fertilization, but more likely it is due to the pH being off. Too high or too low a pH can lock up nutrients in the form of undisolvable salts and compounds, some of which are actually toxic to the plants. What then happens is the grower then tries to supplement the plants diet by adding more fertilizers, throwing off the pH even more and locking up even more nutrients. This type of problem is seen more often in soil mixes, where inconsistent mixing of the medium's components leads to "hot" spots.

Figure 6.

Figure 7.
  Last modified: 21:13 - Jun 22, 2001  

faq:1022 "Do the leaves have burnt blotches on them?"