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Torch Lilies


Question
QUESTION: Hi,
I live in zone 9 (central FL)and have many torch lilies and  have been anticipating their blooming. Over the past couple of weeks a group of my torch lilies have developed bright orange leaves which appear to be dying. Each day it seems like more have turned orange. Thanks for any advise you can provide.

ANSWER: Hi Charlotte,
Thanx for your question.  By torch lilies I'm going to assume you are talking about Kniphofia?  This plant is seldom affected by pests or disease with two exceptions.  Thrips and foot and root rot.  The foot and root rot is caused by soil that doesn't drain well.  Generally, in Florida you have pretty sandy, well draining soil but there are exceptions.  Also, if you are feeding the plant, I would stop.  Sometimes overfertilizing causes a type of burning in the leaves.  What has changed between now and before the torch lilies started changing leaf colors?  I hope this helps.
Tom

---------- FOLLOW-UP ----------

QUESTION: Hi,

  I went digging in the bed with the torch lilies and I think it may be the root rot you mentioned. The affected blades pulled out easily from the clumps and smelled foul. We have had above average rainfall this summer beginning around late June/early July. The Good news is that 95% of my garden loves it. As to the torch lilies however; If this is root rot can the affected plants be saved. What should I do?
Thank you

Answer
Hi Charlotte,
Thanx for the additional information.  When I first grew torch lilies from seed I would lose them in the winter.  The reason?  The crown gets soggy and rots if one allows moisture to sit on it.  If you have clay soil, amend the soil with lots of compost.  The soil absolutely has to be free draining.  Torch lilies come from South Africa and are used to sandy, well drained soils.  Make sure the plants are planted on the high ground.  Don't plant where water is draining or will sit for any length of time.  Keep out of low spots and out of shady spots.  The fungal infection I mentioned previously is caused by phytophthora.  It is difficult to control.  Here's a link to North Carolina State University which gives recommended chemical control.  By the way, in Florida, phytophthora attacks citrus and blueberries too.  I hope this helps.
Tom

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