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I have recently repotted my schefflera plant (it stopped growing due to how small the previous pot was) and it’s started growing again but all the new growth is yellow! The old leaves are perfectly fine and green.

I’m wondering if it’s an iron deficiency, overwatered or lack of sun - I do live in Scandinavia so sunlight is quite minimal this time of year.

Is this an issue and if so, how can I fix it?

Thanks!

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  • What soil did you use to repot? This is odd because the leaves don't look unhealthy other than the fact they're yellow... and note they don't need direct sunlight indoors anyway – Bamboo Dec 26 '18 at 18:24
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@Ally Hey good question. I have never grown this plant before so I defer to more experienced folks when it comes to caring for it:

https://www.ambius.com/learn/online/plant-doctor/caring-for-the-schefflera-plant/

In terms of nutrients; I believe your best bet would be to test the pH of your soil. The magic number for your plant seems to be about 6.5 (not unlike most plants). While you can buy kits online that will help you test for various levels of various nutrients in your soil, iron is not usually one of them. Usually, if you want to test for iron you would need to either take a leaf sample and send it in to a lab or break out the chemistry kit and sulphuric acid. That being said, nutrient uptake is usually the problem (not nutrient deficiency) and the way to correct that problem is to manage your soil pH.

So my suggestion would be to follow the instructions laid out in the link I provided you for, caring for your Schefflera, and to go to a lawn and garden center to pick yourself up a pH testing kit. Just remember, lime is what you add to make the soil more alkaline and sulfur is what you add to make it more acidic.

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Contrary to the other answer I don't think that your soil pH has anything to do with it. It definitely isn't iron deficiency (it looks completely different and is almost nonexistent with potted plants anyway due to commercial potting soil usually having a pH of between 6-6,5 that prevents iron deficiency from developing), but it's true that this might have something to do with the composition of the potting soil you've used (some, especially cheap ones have little to no nutrient and humus content that lead to all sorts of problems later on).

My bet would be nitrogen deficiency though. The (pale) yellowing and the stunted growth match these symptoms perfectly. Just use some generic fertilizer solution for a couple of weeks and if the symptoms resolve (relatively) fast then it's definitely N deficiency.

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