Arum decline

Jo&Greg sun-coast-pearl@telus.net
Tue, 21 Jan 2020 10:07:49 PST
I am naïve about many reasons for plant decline, yet sometimes a simple question gives answers.
1. Light levels as well as the type of light (direct, indirect, day length) are important to the few hardy arums I've had in my garden. Has this changed since they were originally put in their spots?
2. Has any of the components of your fertilizer or the profile of your soil's nutrients and minerals changed ... sometimes companies "improve" them and an added or removed element can be the culprit.
3. How old are your plants? Nothing is immortal, and perhaps some of them are reaching the end of their natural life cycle. 

Just a few thoughts to consider.

-----Original Message-----
From: pbs <pbs-bounces@lists.pacificbulbsociety.net> On Behalf Of Arnold Trachtenberg via pbs
Sent: Tuesday, January 21, 2020 7:21 AM
To: pbs@lists.pacificbulbsociety.net
Cc: Arnold Trachtenberg <arnold140@verizon.net>
Subject: [pbs] Arum decline

I've had these Arums for a number of years.  A. palaestinum, A. korolkowii and an Arum I was given by a colleague in Puglia, Italy.
The soil has been changed and pots sterilized more than once.
I feed with an organic fertilizer Down to Earth which is a blend of organic components.
I have them under some T-5 LED lights in a cool greenhouse not below 45-50 F.
Any suggestions would be most appreciated as to how to correct this condition.

This has occurred for 3-5 years.  The initiate growth and around this time of year the leaf wilt appears.
Thanks in advance.Arnold New Jersey
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