Help!? Is this a Mg deficiency?

the.underachiever said:

I think this is a magnesium deficiency, but I'm not sure. What do you guys think? My ph is 7, and the ec of my tap water is 400 ppm. ???
This is frustrating. I have started adding epsom salts to my water, but I am still getting a few leaves that go yellow/rusty, and dry up.

Click to expand...

the.underachiever said:

I think this is a magnesium deficiency, but I'm not sure. What do you guys think? My ph is 7, and the ec of my tap water is 400 ppm. ???
This is frustrating. I have started adding epsom salts to my water, but I am still getting a few leaves that go yellow/rusty, and dry up.

Click to expand...

• Symptoms: Growth slows. Younger leaves turn pale yellow, often starting between veins. May develop dark or dead spots. Leaves, shoots and fruit diminished in size. Failure to bloom.
• Sources: Compounds containing the words 'manganese' or 'manganous'

• Calcium (Ca)
  • Symptoms: New leaves are distorted or hook shaped. The growing tip may die. Contributes to blossom end rot in tomatoes, tip burn of cabbage and brown/black heart of escarole & celery.
  • Sources: Any compound containing the word 'calcium'. Also gypsum.
  • Notes: Not often a deficiency problem and too much will inhibit other nutrients.
  
  Nitrogen (N)
  • Symptoms: Older leaves, generally at the bottom of the plant, will yellow. Remaining foliage is often light green. Stems may also yellow and may become spindly. Growth slows.
  • Sources: Any compound containing the words: 'nitrate', 'ammonium' or 'urea'. Also manure.
  • Notes: Many forms of nitrogen are water soluble and wash away.
  
  Magnesium (Mg)
  • Symptoms: Slow growth and leaves turn pale yellow, sometimes just on the outer edges. New growth may be yellow with dark spots.
  • Sources: Compounds containing the word 'magnesium', such as Epson Salts.
  
  Phosphorus (P)
  • Symptoms: Small leaves that may take on a reddish-purple tint. Leaf tips can look burnt and older leaves become almost black. Reduced fruit or seed production.
  • Sources: Compounds containing the words 'phosphate' or 'bone'. Also greensand.
  • Notes: Very dependent on pH range.
  
  Potassium (K)
  • Symptoms: Older leaves may look scorched around the edges and/or wilted. Interveinal chlorosis (yellowing between the leaf veins) develops.
  • Sources: Compounds containing the words 'potassium' or 'potash'.
  
  Sulfur (S)
  • Symptoms: New growth turns pale yellow, older growth stays green. Stunts growth.
  • Sources: Compounds containing the word 'sulfate'.
  • Notes: More prevalent in dry weather.

• Boron (B)
  • Symptoms: Poor stem and root growth. Terminal (end) buds may die. Witches brooms sometimes form.
  • Sources: Compounds containing the words 'borax' or 'borate'.
  
  Copper (Cu)
  • Symptoms: Stunted growth. Leaves can become limp, curl, or drop. Seed stalks also become limp and bend over.
  • Sources: Compounds containing the words 'copper', 'cupric' or 'cuprous'.
  
  Manganese (Mn)
  • Symptoms: Growth slows. Younger leaves turn pale yellow, often starting between veins. May develop dark or dead spots. Leaves, shoots and fruit diminished in size. Failure to bloom.
  • Sources: Compounds containing the words 'manganese' or 'manganous'
  
  Molybdenum (Mo)
  • Symptoms: Older leaves yellow, remaining foliage turns light green. Leaves can become narrow and distorted.
  • Sources: Compounds containing the words 'molybdate' or 'molybdic'.
  • Notes: Sometimes confused with nitrogen deficiency.
  
  Zinc (Zn)
  • Symptoms: Yellowing between veins of new growth. Terminal (end) leaves may form a rosette.
  • Sources: Compounds containing the word 'zinc'.
  • Notes: Can become limited in higher pH.