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  #1  
Old August 6th, 2008, 06:26 PM
supermanbaja supermanbaja is offline
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meyer lemon tree leaves are turning yellow

meyer lemon tree leaves are turning yellow
what is the problem?
Not all of the leaves are doing this just about 5 are and I have massive amounts of new growth, even some of the new smaller leaves are yellow.
the fertilizer I use is Dynamite #9. can the fertilizer be old and not work very well, because I added some miracle gro and it had massive amounts of grout about 4 days later,
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  #2  
Old August 7th, 2008, 07:27 AM
skeeterbug skeeterbug is offline
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Re: meyer lemon tree leaves are turning yellow

It is not uncommon for citrus trees to shed older leaves and they often remove nutrients before dropping the leaves causing them to turn yellow. As long as you are getting good healthy growth, you are probably doing fine. New leaves are lighter colored, but if you are seeing dark green veins with yellow around them or yellow areas, you may have mineral deficiencies. I am not familiar with all the formulations of Dynamite, but does the one you use have trace minerals or minors including Mg? If not you need to add them separately.
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Old August 7th, 2008, 07:30 AM
supermanbaja supermanbaja is offline
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Re: meyer lemon tree leaves are turning yellow

I even have some of the small 1inch leaves that are all yellow
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  #4  
Old August 7th, 2008, 09:16 AM
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mr.shep mr.shep is offline
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Re: meyer lemon tree leaves are turning yellow

It seems you applied just the Magnesium sulfate
form of Dynamite (blue canister). I would use
the Dynamite Palm & Citrus food (yellow can)
instead or use both of them mixed together with
a P&C at a rate of 2 pounds mixed in with 1
pound of their Magnesium sulfate for outdoor
plants (I would go four to one for an indoor
grown, in the home plant).

There is a fine line in Citrus in what is a nutrient
deficiency and what is a nutrient toxicity and
Calcium, Copper, Boron and even Magnesium
can be both a deficiency seen on some plants
and can be a toxicity on other trees. Your leaf
is a closer to being a Calcium deficiency for
an outdoor container grown tree of which an
application of Magnesium sulfate can help
for this symptom. All yellow colored new
growth is generally a symptom of not enough
Nitrogen - I cannot see a series of leaves to
confirm but most of the time it is due to a
lack of available Nitrogen that causes the
new growth to be a pale yellow in color
for outdoor container grown trees (in the
home trees can do this from lack of ambient
or direct light). The allover yellowing of the
new growth leaves with some green webbing
seen near the petiole can also happen with a
severe Calcium deficiency in an in ground
tree but the edges and sometimes the tips of
the new growth leaves usually turn brown
and can become crispy fast when exposed
to any kind of direct warm to hot sun. The
noticeably smaller sized leaves with an allover
yellowing both for indoor and outdoor grown
container plants is an indication of a Zinc
deficiency. We will see the webbing more
easily on the older growth but if we see it
on the new growth then a lack of Zinc in
the plants system is your main culprit, more
so than Calcium. The size of the leaf in the
photo is not indicative of a Zinc problem yet,
however.

Depending on whose clone of Improved Meyer
Lemon you have as there are two of them in the
nursery trade out here, one of them is susceptible
to more yellowing than the other form is. As a
potted tree, tree grown in a container, one clone
does seem to yield a high percentage of yellow
and green leaves (a natural condition and is not
necessarily a Calcium deficiency) until the trees
better adapt to their new growing environment
and the new potting soil. We had an abundance
of yellow and green leaves such as yours shown
in the photo for two years on our Improved Meyer
Lemon seen mostly on the older growth. The
younger growth never did color up well but
were not yellow either until the tree finally
developed a root system on it. I made sure
not to give this tree any additional Nitrogen
until its third year in the fifteen gallon can.
I am pleased to say that this year there is not
a single yellow or yellowing leaf on the plant
after two Spring applications of a hand mixed
Vigoro Citrus food (20 pounds) - MiracleGro
Citrus Shake and Feed (4 pounds) - Dynamite
Palm & Citrus (2 pounds). - the trees first taste
of applied Nitrogen since we've had it.

Jim
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  #5  
Old August 8th, 2008, 05:35 PM
supermanbaja supermanbaja is offline
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Re: meyer lemon tree leaves are turning yellow

no its the green canister fertilizer
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  #6  
Old August 9th, 2008, 12:47 AM
skeeterbug skeeterbug is offline
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Re: meyer lemon tree leaves are turning yellow

Does it contain minors?
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  #7  
Old August 9th, 2008, 06:54 AM
mr.shep's Avatar
mr.shep mr.shep is offline
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Re: meyer lemon tree leaves are turning yellow

Skeet, here is a link to Dynamite Plant Food : Products.
I am familiar with the green canister Dynamite Plant Food : Products : All Purpose
as well as the former darker green colored can that
I have purchased in the past from a Home Depot.

I believe the Leo Klotz handbook on Citrus diseases
would consider the appearance of the leaf to be due
to an overall lack of nutrition. The high gloss on the
leaf tells or would indicate to me a more specific nutrient
imbalance for an outdoor grown tree.

There has been no mention of the age of the tree,
whether this tree is being grown indoors and what
kind of light arrangement, what potting soil is being
used, how often this tree has been fertilized and
what concentrations of fertilizer has been used.
Answers to the above questions may come in
handy for Skeet, Millet, Laaz, Junglekeeper and
Dale to know so they can chime in and be of
more help.

Jim

Last edited by mr.shep; August 9th, 2008 at 08:41 AM.
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  #8  
Old August 10th, 2008, 11:23 AM
drichard12 drichard12 is offline
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Re: meyer lemon tree leaves are turning yellow

supermanbaja: I feel mr.shep and skeeterbug are both offering some very sound advice to what you may feel to be a problem. I also feel that it's important to know if your Lemon is in a container or inground. I'm thinking that living in Spokane WA. It's container grown. Please reply. Dale
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  #9  
Old August 12th, 2008, 02:32 PM
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Laaz Laaz is offline
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Re: meyer lemon tree leaves are turning yellow

How about a photo of the entire tree. Very hard to tell you anything from a photo of a single leaf. As has been stated Meyer lemons will shed older leaves & some Meyers will have quite a few yellow leaves. I have noticed that when my Meyer have a heavy new flush, it will drop quite a few old (yellow) leaves.
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