Amorphophallus-Forum.de

Hello
for me it looks like sunburn
... and the pots are not riding small? can also be deceiving in the picture
I made the experience, the greater the pot, they are more resistant.
Let's see what do the pros here

Hello Olvi,
I am thinking of sunburn less, rather drought or deficiency. Sunburn would not be so uniform only from the leaf tips.
How long has the paper been standing? Is it possible that he is already starting to move in? Look at what the leaf looks like in the backlight, there are usually also bright spots to be seen, and whether the trunk is already softer.
Larger pots are a good throw-in which are very beneficial to growth.
Greetings
Michael

You could even now repot the plants if there are still no signs of feeding.

The yellow or even almost white spots are probably no longer repairable. This looks better with the places that are still rather green but already brightened. I can hardly say how quickly fertilisation will be visible. At that time several years ago with the myrtle in Hydro, an improvement was already visible after about 3-4 days. But I had already reacted at the first signs (smaller and lighter leaves at the shoot tips).

Hello Olvi,
they are not too dry or too humid? Both also cause yellow leaf tips; because what to change would be my first thought.
Michael

Hello Olvi and everyone else,

I would not necessarily rule out sun damage, because on two Arisaema fargesii I find quite similar symptoms:

index.php?page=Attachment&attachmentID=5264 index.php?page=Attachment&attachmentID=5265

On other pots, which stand more shady and get less sun, I do not find the brightened leaf tips.

Olvi, a larger pot and fertiliser would certainly be worth a try, but I suspect more of an irradiation damage.

In the past few days, the radio has repeatedly pointed out extremely high UV radiation and the whole thing near Hanover near Temmperaturen of over 30, yesterday 37 °C.

My IG already shows the Balttrandnecrosen, which actually occur again and again in hot summers, even though I see the plant in a 90-L container and are poured abundantly every day. index.php?page=Attachment&attachmentID=5266

The conditions are really extreme at the moment...

Happy growing, Bernhard.

a very precise explanation could only confirm an analysis - but this seems to me rather not sunburn - these are rather fertilizer deficiency symptoms - but I guess rather heat-related with stressful situations - to a calcium deficiency - this is with many cultures...

but if you don't know exactly what you're doing - then I'd leave it as it is - because with some x-belibigen lime or something, fertilizing to start with topfkulturen is a saublöde idea because you fertilize too much and thereby change the ph worth too badly and then much more is skinned than helped...

if it's really only ca - then don't do anything else - because in the tap water is normal anyway half-way ca in it that it doesn't get worse - and in the worst case "only" doesn't look nice - but the plant will survive without further ado...

10-fold is plentiful, wherefor a 1 cm lump is a 10-piece pot Ok. In the end, however, it may even prove to be too small. I read somewhere from a user who made it to just under 150 g. Such a tuber then has about 6-7 cm in diameter and should blow up the 10-pot together with the roots and brood-knollen/arms. This looks like there on the 4th picture.

The larger the tuber, the smaller the ratio can be. But I wouldn't go under 2 times the tuber diameter when it is a pot size. (3)4-5 (6) times the tuber diameter depending on the tuber size is normally sufficient. If the plant develops better than expected, it can still be repotted. Oh yes, I would always use the inner diameter of the pots.