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Nutrient deficiency / excess in Citrus

Posted by sreyan 6a (My Page) on
Fri, Jul 25, 14 at 13:36

Hi,

I'm new to container gardening and citrus plants. I repotted the plant after I got it from the nursery a month ago as they suggested, and I've noticed some new growth.

The growth however seems to be a different color than the rest of the plant, with a red / purple tint (circled in the image)

Questions:
* With respect to the reddish leaves: Is this an indication of nutrient deficiency / excess?
* With respect to the strange growth: Is this a pest or insect I need to eliminate? It looks like the plant but is different that the other new growth.

Thanks,
Sreyan


Follow-Up Postings:

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RE: Nutrient deficiency / excess in Citrus

Here's the growth that doesnt look like the rest.


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RE: Nutrient deficiency / excess in Citrus

I can't really see from the pic....but is that a purplish flower bud?

Also, a detail of those leaves would help. Plant leaves appear to be stippled, as with severe mite damage.

Josh


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RE: Nutrient deficiency / excess in Citrus

Hi Josh, thanks for your help!

I'm doing some posts in succession because I can't figure out how to post more than one image at a time.

This image is for scale. The plant in question is the citrus with the tiny leaves. It's in a ~8" pot. The other citrus plants with the large leaves are in the 6" pot.


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RE: Nutrient deficiency / excess in Citrus

Here is a picture of the leaf enlarged as much as I could. Hopefully it's better than what I got with my cellphone this morning.

In case there are mites, I've sprayed all three citrus trees down with a lot of rubbing alcohol. I'm not sure if that's effective against mites however. What are recommended treatments?


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RE: Nutrient deficiency / excess in Citrus

Here's the mysterious growth. I didn't think it could be a flower bud because the plant is so small.

Should I be concerned that it's flowering at such a small size and thus making a last ditch effort to propagate?


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RE: Nutrient deficiency / excess in Citrus

Here's one last pictures of the leaves post spray down.

It looks like an ant died. This also has a better picture of the purple leaves. Could mites cause the leaf to be purple?

Thanks again, and sorry for the multiple posts.

-Sreyan


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RE: Nutrient deficiency / excess in Citrus

New growth is often purplish in a variety of plants.

The thing that looks like a flower bud is still not quite clear enough....but I assume it's a bud. Don't worry about it flowering...it will most likely abort once it has bloomed (or even if a fruit sets).

The leaves would seem to indicate mite damage. I prefer several repeated treatments of Neem oil to battle mites.

The pots are already too small for these plants. Looks like you're using Gritty Mix (good job, there), but looks like some fertilization is needed to get a greener green from the tree on the left in the group photo. How are you fertilizing?

Josh


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RE: Nutrient deficiency / excess in Citrus

I will do several rounds of neem oil application. Should i do this for just the tree in question, all of my citrus plants, or all plants near by?

Ouch! I bought these from Logees a month ago the two smaller ones were potted in 2" pots and the bigger one was potted in a 4" pot. I thought I was giving them too much space in 6 & 8 " pots. I assume they're good for repotting so soon given they are all pushing new leaves? Should i stick with terracotta?

I fertigate with dynagrow foliage pro diluted at a ratio of 1/4 tsp per gallon. Watering frequency has depended on weather, on average every two days or so.

Thanks,
Sreyan


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RE: Nutrient deficiency / excess in Citrus

Great, you're using Foliage Pro. I'd go with a heavier dose, once or twice a week. With my Meyer Lemon, I comfortably fertilize with 1.5 teaspoons per gallon of water, once a week.

I wouldn't want to re-pot so soon....and I hate to say it. Perhaps others will comment on the containers. I'm looking at the plants and anticipating more growth this season.

There is an interesting debate regarding terracotta. I see that you're located in a zone 6, which means cold Winters. Many folks in the northeast, for example, are finding that black plastic containers help keep the roots warm and the plants more vital during the colder months, including the Spring transition out of doors. I hope some other growers will chime in.

As for the Neem treatment....yes, treat all of your Citrus. I like to do lighter Neem treatments, repeated three times, three days apart. That said, the stippling on the leaves could be *old* damage, and there might not be any mites currently. But Neem won't hurt, so you might as well be pro-active.

Josh


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RE: Nutrient deficiency / excess in Citrus

As much as I like, and use Foliage Pro, I make citrus the exception. Because of the micro nutrients,Boron, Iron,Manganese,Molybdenum and Zinc, found in the preferred amounts, in citrus labeled fertilizer, I prefer to use it on citrus. For container grown citrus, because of the limited amount of soil, and the frequency of watering required, I have found monthly fertilizing year around, in the amount of one tablespoon per month, scratched into the surface to be about right. Al


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RE: Nutrient deficiency / excess in Citrus

I agree that there's more than one way to skin a cat, Al ;-)

I use Osmocote, scratched into the surface, for a little nutrient overlap. But I also supplement a few times a year with iron chelate that Tapla sent me. Then, with the weekly Foliage Pro, my plants are covered.

Josh


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RE: Nutrient deficiency / excess in Citrus

Josh, are those standard chelates or a special kind conducive to container growing?


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RE: Nutrient deficiency / excess in Citrus

Hey! I don't think it is particular to containers...rather, sounds like it helps with poor soils. But either way, I only use a light dose a few times a year....just in case. I really do think my Citrus are covered between the Foliage Pro and Osmocote; however, with so much flushing, I figure why not.

The product is called Sprint 138 iron chelate.

Josh


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