Amorphophallus-Forum.de

Hello

For about two months, the leaves of my now 18-month-old A. dye titanum yellow. I'm not sure whether he moves in, or whether he may be a "sunburn; got because the shaft of the blade still looks as fresh and in other types of you notice Yes the feeder first on a schrumpeligen stick. Since 1.Okt., he stands in a mini greenhouse with 13 hours light 4 x 15 Watt plant light (ESL). I'm just in case some time switched off a lamp, but the yellowing progresses as the pictures show (where the great "burn in the summer under the real Sun was).

My asked thus: this looks like taking off or sunburn?

And: how much light needs A. titanum? Culture instructions nix is accurate because unfortunately, I don't know, how to correctly describe the amount of light, comes to the range of distance from the source and what else is going on. Maybe you gave me some clues. I have a few seedlings in the same box and I want to grill that not already at the beginning...

Ever thank you very much for your help

Michael

(The pictures are of 27.10, 30.11 and 9.12.2013)

Hello

first thanks for your answers.

My lamps are four energy saving bulbs MegaMan Plantlamp W1215P / MM, 152, 15 watts. That actually billigsdorfer plants lamps by Obi are why I actually thought that an overdose of light is not possible. On the net, I found that the lamps have 400 lumens and correspond to each 75 watts, but without guarantee. There is no information concerning technical data manufacturer pages. I've asked at but there and wait for reply.

The distance to the lamps are 10 cm, but I turned off the bulb directly over the affected titanum already since the first signs of yellowing. Today have I switched off another, so that now only two lights next to the plant. I've reduced the time to 10 hours. I hope that this is Titans now not too little for the boys who have Yes also a greater distance (approx. 24 cm). Do you think this makes sense? I thought about already to go whole and to offer all available light the dying leaf for the "last" surge...

The little is currently quite fine. They are still very pale green, but think that this is normal in young plants.

Here are photos of the spectrum of the lamps and the whole box in the 23-35 ° C and 65-99% rel. humidity prevail.

Love greetings

Michael

Hello

have a Lux meter set to and equally measured:

With 4 lamps I've measured distance in ca cm9 15,000 lux, at 19-20 cm 8300 Lux and 35 cm distance even 3000 Lux.

With 2 lamps that burn just yet, there are still 6000, 3500 and 1600 Lux. Measured in the middle of the box.

This is not little, measured on a bright summer day but still not overly much. But I don't know in how far are the values to use, because the spectral sensitivity of the Lux meter pretty much opposed to the distribution of colors of the spectrum of the lamps is distributed.

The scorched leaves had about 10,000 lux and now stand at 3200.

The leaves of the seedlings are now with 2 lights at about 3500 Lux. I don't know if this is enough or even too much.

Love greetings

Michael

Hello

Root or tuber damage would not like me. Does it make sense, because time to buddeln? Would you keep even seedlings in the living room? I never have climbed me, because the culture instructions which are so speaking of special needs. For me, it has also at night sure times below 20 ° C and with old Windows, I have also a quite train on the Windows...

To wet feet could be, the substrate is slightly moist, although I had to pour no longer sure about a month ago, the condensation at night has been sufficient so far.

Get first place the lid with distance, then I have lower relative humidity and temperature and more distance to the light.

Michael

Addendum to tuber and roots...

I little gebuddelt and normally on the first tuber and roots looks good. It's just funny that the tuber unilaterally grows from the root, opposite the old seed pod. Completely elsewhere is now already a new drive (left in the picture), I feel funny.

Hello

For your answers, my little thank you hold now dry. I also wonder how a week alone come through over the holidays.

Merry Christmas

Michael

Quick update:

my little ones develop quite well with beautiful dark green leaves (Figure 1), only two have a small problem, they have similar to the large (see above) brighter leaves with dark veins (Figure 2); may be, that are always still slightly too moist, or otherwise have deficiencies (tap mg or Fe).

But: the older seedling has now after short 18 months and above problems the first sheet moved; and behold, the bulb seems to be healthy, albeit with a second drive (Figure 3). Weighs 61gr. and is again in the "Earth sunk. Curious how this continues...

@ titanutzz: I dont have any experience with LED grow lamps, but I'd wait as long as possible because LED's get better and cheaper from day to day.

Hi Bernard,.

Thank you for the flowers, I am also very satisfied with the result.

Because of the second drive here is still a photo:

Love greetings

Michael