How to revive sick teddy bear magnolia?

stephenrowett

I purchased this magnolia teddy bear from bunnings @ half price due to supposed sun damaged leaves. I am happy with the decision as I wish to experiment with propagation. However what I am noticing is that the new growth is also browning at the leaf tip. It actually looks like the new growth is being eaten .. very different to the original burnt leaf damage. I have also noticed a few tiny black flying insects and even tinier white non flying specs with legs ( i think ) they're so small i can't be sure.. I have been monitoring moisture levels and ph balance..all within recommended range.. I was hoping for some advice on what to do to stop this.. The plant appears to be sprouting new vegetation well but something is attacking the new growth

EricL

Hello @stephenrowett

Welcome to the Bunnings Workshop community. It's sensational to have you join us, and thanks for sharing your question about your magnolia teddy bear.

Firstly, I love that you grabbed it at half price with propagation in mind (bargain!). That’s exactly the kind of plant experiment that often turns into a real success story. From your photos and description, the original leaf damage does look like classic sun scorch. The brown patches on older leaves are consistent with that. But the browning and distortion on the new growth is different, and you’re absolutely right to notice that.

The tiny black flying insects combined with very small white specks with legs strongly suggests a sap sucking pest issue rather than ongoing sun damage. On magnolias, the most common culprits affecting new growth are thrips, aphids, or spider mites. Thrips in particular can cause browning at leaf tips, distorted new growth, and that “chewed” appearance without obvious holes. They’re very small and easy to miss. The black insects you see flying could also be fungus gnats, especially if the potting mix stays moist, but fungus gnats usually damage roots rather than leaf tips.

The white moving specks you mentioned are important. If they are crawling on the undersides of new leaves, that leans more toward aphids or mites. If they’re extremely tiny and hard to see clearly, spider mites are possible. Thrips are slender and fast moving.

Here’s what I would suggest doing next. First, isolate the plant from others if you haven’t already. Even light infestations can spread. Second, inspect the undersides of the newest leaves and along stems using a magnifying glass if you have one. You may see tiny elongated insects or clusters of small soft bodied pests.

Third, give the plant a firm hose down, especially under the leaves. This physically removes a large number of pests and is surprisingly effective if done every few days.
After that, apply an insecticidal soap or horticultural oil, making sure to coat both sides of leaves and new growth. Repeat weekly for a few weeks. If it is thrips or mites, consistency is key because you need to break the lifecycle. Avoid spraying in direct hot sun.

Because your moisture and pH are in range and the plant is actively pushing new growth, the root system is likely fine. That’s a great sign. The fact it’s sprouting well means it has good energy reserves and should recover nicely once the pest pressure is reduced.

Keep monitoring the new leaves. If the fresh growth starts emerging clean and healthy after treatment, you’ll know you’re on the right track.

You’ve absolutely made a solid decision picking it up. Magnolias are tough once settled, and you’re already paying close attention, which makes all the difference. With a little pest management, this one has every chance of bouncing back beautifully.

If you need further assistance, please let us know.

Eric