Hibiscus leaves turning yellow ?

Alice G
by Alice G
Can anyone tell me why all my hibiscus leaves are turning yellow ? It doesn't matter if they are potted or planted. It seems I'm pulling them off every day
  17 answers
  • Douglas Hunt Douglas Hunt on Jul 27, 2013
    It really could be either, Alice. It's more likely to be too little water, especially given how hot it has been lately, but hibiscus don't like to be really wet, either.
  • Alice G Alice G on Jul 27, 2013
    Hi Doug, The ones in the yard get water 4 times a week with my sprinklers and when it rains. The ones in the pots,I only water when they are just starting to get dry. This seems to be an on going thing with this
  • Douglas Hunt Douglas Hunt on Jul 27, 2013
    The ones in pots are much more vulnerable to the heat than the ones in the ground. It would not surprise me if you saw more yellow leaves on those. If you don't think it's a water issue, it's possibly a mineral deficiency, likely iron, possibly magnesium. In that case, you'd want to apply iron chelate or magnesium sulfate (here's a case where Epsom salts really would be beneficial).
  • Alice G Alice G on Jul 27, 2013
    Its kind of the same all around. I have about 3 mature tress that are planted and are full of yellow leaves, the ones in the pots are on my lanai, and I water them probably every other day or when I see them starting to dry up
  • Douglas Hunt Douglas Hunt on Jul 27, 2013
    I added to my answer above. It sounds like you might have a mineral deficiency.
  • Alice G Alice G on Jul 27, 2013
    Thanks Doug I'll try the magnesium I did that to my robelinis when they had frizzel palm and it cleared it up, thanks again
  • David Moffitt David Moffitt on Jul 28, 2013
    Alice, mine did the same thing when it was in a self watering planter. It sucked the water as it needed it, and it took plenty. I found that by adding 2 tbsp of epsom salt to the water stopped the dying and yellowing leaves. It happens because of a magnesium deficiency, of which is not a readily available mineral. Just add it to the water, and give it a good stir. I also added a fertilizer spike to mine, every couple of months. The spikes are slow release, so they last longer than most would think. Just because you can't see it, doesn't mean it is still not working for you.
  • Alice G Alice G on Jul 28, 2013
    Hi David I put some magnesium around all of them the other day hope that works Thanks for your input
  • Nancy Hand Nancy Hand on Jul 28, 2013
    Alice they are using a lot of energy blooming they need some more food! :)
  • Sheryl Grimm Sheryl Grimm on Jul 29, 2013
    I can't help as far as answering this post but would like to know when I can trim my hibiscus back? I have one that's growing up..its at about 3 1/2 feet tall right now but not bushy, The plant is loaded with blooms.
    • Mogie Mogie on Apr 03, 2023

      I cut mine back every year around fall. Cut them to about 6 inches tall.

  • Leona G Leona G on Jul 29, 2013
    Hibiscus don't like erratic watering. They will yellow out with either too little or too much. Do you know how much water the ones on your sprinkler system are actually getting. Your grass needs 3/4 of an inch of water once or twice a week but the hibiscus needs at least 1 1/2 inches of water at a time so you are probably not getting enough water from your irrigation system. If the ones on the irrigation system have been in the ground for a couple of years you could probably disconnect the system and just hand water when needed. The yellowing looks ugly but won't really hurt the plants. Good luck
  • Douglas Hunt Douglas Hunt on Jul 29, 2013
    @Sheryl Grimm you will get more responses if you post your question as a new question using the red "post/ask" button at the top of the page. I cut my hibiscus back in February, after any chance of frost. You're going to lose all your blooms if you prune now.
  • Sheryl Grimm Sheryl Grimm on Jul 29, 2013
    thanks Douglas!
  • Mikell Paulson Mikell Paulson on Jul 29, 2013
    We had them in AZ. and we put iron around the drip line. That is what they needed, It did the trick!
  • Debbie Stanley Debbie Stanley on Jul 30, 2013
    Would the same thing be true of Rose of Sharons? I have the same thing happening to them. I am in NC and we have had a lot of rain this summer. Or could they be low in some mineral?
  • Mikell Paulson Mikell Paulson on Jul 31, 2013
    Debbie , it can hurt to try! Good luck!
  • Dorian Dorian on Mar 26, 2023

    I just purchased a lilac hibiscus tree and planted it into a wine barrel. Holes in the bottom for drainage and roots. The weather here in Arizona has turned some hotter. Some of The leaves have yellowed and withered. It was planted with plant food granules. To much water/to little? It’s on a drip system? Needs Minerals? Epson salt? Suggestion?