I have a similar issue going on with one of my plants.
Garrigan65 posted this for me. I’m sure dbrn32 is correct on the mag def.
Your plant looks exactly like mine. But accurate readings of in and out ph and ppm would be a big help.
I am currently treating with 1tsp of Epsom Salt per gal of ph’d water only. I am in soil but there is a soiless fix in the post.
Below is my thread.
Magnesium helps supports healthy veins while keeping a healthy
leaf production and its
structure. Magnesium is significant for chlorophyll-production
and enzyme break downs.
Magnesium which must be present in relatively large quantities
for the plant to survive,
but yet not to much to where it will cause the plant to show a toxicity.
Magnesium is one of the easiest deficiencies to tell… the green veins
along with the
yellowness of the entire surrounding leave is a dead giveaway, but
sometimes that’s not
always the case here. In case you have one of those where it doesn’t
show the green veins,
sometimes leaf tips and edges may discolor and curl upward. The growing
tips can turn lime
green when the deficiency progresses to the top of the plant. The edges
will feel like dry
and crispy and usually affects the lower leaves in younger plants, then
will affect the
middle to upper half when it gets older, but It can also happen on older
leaves as well.
The deficiency will start at the tip then will take over the entire outer
left and right
sides of the leaves. The inner part will be yellow and or brownish in color,
followed by
leaves falling without withering. The tips can also twist and turn as well
as curving
upwards as if you curl your tongues.
Excessive levels of magnesium in your plants will exhibit a buildup of toxic
salts that
will kill the leaves and lock out other nutrients like Calcium (Ca). Mg can
get locked
out by having too much Calcium, Chlorine or ammonium in your soil/water.
One of the worst problems a person can have is a magnesium def caused by
a ph lockout.
By giving it more magnesium to cure the problem when you are thinking you
are doing good,
but actually you are doing more harm then good. When the plants can’t
take in a nutrient
because of the ph being off for that element, the plant will not absorb
it but it will be
in the soil… therefore causing a buildup. A buildup will be noticed by
the outer parts of
the plant becoming whitish and or a yellowish color. The tips and part
way in on the inner
leaves will die and feel like glass. Parts affected by Magnesium deficiency
are: space
between the veins (Interveinal) of older leaves; may begin around interior perimeter of leaf.
Problems with Magnesium being locked out by PH troubles
Light Acid Soils, soils with excessive potassium, calcium and or phosphorus
Soil
Magnesium gets locked out of soil growing at ph levels of 2.0-6.4
Magnesium is absorbed best in soil at a ph level of 6.5-9.1 . (Wouldn’t
recommend having a
ph of over 7.0 in soil) anything out of the ranges listed will contribute
to a Magnesium
deficiency.
Hydro and Soil less Mediums
Magnesium gets locked out of Hydro and Soil less Mediums at ph levels
of 2.0-5.7
Magnesium is absorbed best in Hydro and Soil less Mediums at ph levels
of 5.8-9.1
(Wouldn’t recommend having a ph over 6.5 in hydro and soil less mediums.)
Best range for
hydro and soil less mediums is 5.0 to 6.0. Anything out of the ranges
listed will contribute
to a Magnesium deficiency.
Solution to fixing a Magnesium deficiency
Any Chemical/Organic nutrients that have Magnesium in them will fix a
Magnesium deficiency.
(Only mixing at ½ strength when using chemical nutrients or it will c
ause nutrient burn!)
Other nutrients that have magnesium in them are: Epsom salts, which is
fast absorption.
Dolomite lime and or garden lime (same thing just called different)
which is slow absorption.
Sulfate of Potash, Magnesia which is medium absorption. Worm Castings,
which is slow absorption.
Crabshell which is slow absorption. Earth Juice Mircoblast, which is
fast acting. (a must buy!!
Has lots of 2ndary nutrients).
Now if you added to much chemical nutrients and or organics,( which is
hard to burn your plants
when using organics) You need to Flush the soil with plain water.
You need to use 2 times as
much water as the size of the pot, for example: If you have a 5 gallon
pot and need to flush
it, you need to use 10 gallons of water to rinse out the soil good enough
to get rid of excessive
nutrients.