Conditions look good, plant looks like it is trying to make it - The wilting leaf might need more humidity, but actually there should be plenty if the water is slow to evaporate. Temp seems a bit high for home growing, 20C seems to equal 68 Fahrenheit, and higher doesn't seem much of an advantage, daytime or night. You need better advice than mine.

Thank you guys! Petrushka, do you think the lack of airflow is critical? I plan to install a small fan connected to my computer to give some airflow in the room. What do you think the reason is for the wilt of the edges? i brushed the edges of that leav with a combination of 2 fungicide, tebucanazole and suflur. I also think buying some sort of cheap lamp stand, can't afford expensive growing lights and there is no more room on the windowsill ( as you all know, hoarding plants can get out of hand fast :P )

Woe is correct in that the rhizomes are too low. Raise the plant up or remove some of the soil. If you let it go, it will more than likely die in a few weeks.

I only bottom water this rex and not often. It is in quite dim light but doing very well.

You want the rhizomes to sit on top of the surface much like a bearded Iris.

about air flow..rexes do very well in terrariums - where there is very little air flow, if none at all. humidity is a must however. it happened to me before, that the edges crisped - I think it was fungal and/or drying up (not enough water).

mine was in very good light too and with sufficient air-flow (a/c fan). but I bought it from a store with very crowded shelves, so may be it picked up smth that developed later. so spraying with anti-fungal is a good thing.

I credited Woe with the comment about the rhizome too low in the soil. After re-reading this, I see it was petrushka who mentioned that.

Granted most begonias do benefit from a very humid environment, it is much too difficult to provide this for all your plants unless you have just a few. I have Pink Diamond(s) in a terrarium today as it is one of my favorites. You also limit the growth of a plant by keeping it contained on all sides and the top which seems a shame to have a small version of a plant that likes to get big.

Mildew is the bane of begonias and rexes can really show hideous spots once the spores break out if you aren't proactive or at least reactive when you first see it. I sprayed almost every week this summer with Orchard Spray. I think it has helped tremendously but we are only a couple months into this winter so the verdict is still out.

Pink Diamonds with the lid lifted. It is bumping into the edges of this container - about 12 inches across. The next bigger container I have is 16" and that is it.

Maid Marion disappeared on me recently - the rhizomes are still plump and healthy but no leaves - the problem with rexes. This is a tall cookie jar fitted with a very large cake lid.

Midnight Sun years ago was just pushing the lid off.

The best thing is to have a greenhouse so the interior can always be high humidity. Here are two begonias at the Atlanta Botanical Garden - the dark leaf is U503 and climbing up the small tree next to it. The small green leaf is elaeagnifolia (what a mouthful)

I've never been able to grow this one indoors without containing it in a humidity type container. Rexes are so much easier than bipinnatifida

I bet they shear this at least twice a year due to its rampant growth. If only...

I saw bipinnatifida last year for the very 1st time in Fairchild conservatory in Miami FL. it's quite stunning AND it was blooming too. then I read that it can only be grown in terrarium, unless you have super-humid conditions..

'pink diamonds' is super pretty! but midnight sun is very unusual, being so white-creamy. I've never seen that one.

Many years ago when Home Depot decided to compete with the local nursery chain in Atlanta (Pike's Nursery), they created a new store but can't remember the name exactly - HD Landscape Center (I think). They got some great plants in for little to nothing. One of those was pint/quart? sized pots of wonderfully grown bipi for the low price of $2.50 each so I bought 3. What the heck? Grew wonderful outdoors in our humid summers but went downhill so fast indoors it made my head spin. It is definitely a humidity loving plant.

You only need a small section of leaf to grow new plants of this. I will just have to get some more one of these days.

Midnight Sun is a Logee's hybrid if I remember right. If you can find one, buy it. It is a wonderful grower if you keep it in high humidity. I think Steve's Leaves had it for sale recently but I don't know if they still offer it or not.

so I googled 'midnight sun' and what is see is not half as pretty as yours - mostly muddy green with some pink. rarely a lot of pink.

did yours turn creamy because of weaker light in winter? I like mostly creamy with green veining the best!

I see that taylor and logees both have it...but I don't like what I see on their pix..

Hmm, the one I saw from Logee's looks great but Kartuz is kind of washed out.

It seems hard to find at times but if you get one make sure you start it in a terrarium and then propagate it ASAP to insure you can keep it through a few clones.

Here was my first one when I had a greenhouse. (around 2003)

You can see it changes color as time goes on. Wished this camera kept the date - the trials of early digital, huh? Still a greenhouse so thinking 2003, early 2004 since we moved May of that year

2007 - in a 10 gallon tank with Curly Fireflush and plastic wrap for the top (which one or both begonias pushed the plastic wrap off and killed both)

2008 - worked great in the two 16 inch salad bowls

2009

2010

Lots of variability but a gorgeous begonia I would love to try once more.

i'll keep it in mind definitely, but it appears to me that with less light it gets creamier. or perhaps, it's artificial light that keeps it pale? when it's almost purely pink it's good too though. but I don't like too much spotted green.

this site (it's a portal) has a lot of harmony's hybrids with good pics

from southern oak aquatics in FL

Did you forget the link?

I met Hali and Clay last year when they visited N. GA. for the master gardener expo in Hall County. I ended up buying four plants from them. Gotta quit going to sales. HA!

One of the plants I got from them (philodendron verrucosum)

that'a pretty rare philo...I love it! forgot the name, had to look it up - Ph. verrucosum?

Yes, verrucosum. I bought one before from Logee's. Lost it in no time. That is when I found out that not all philodendrons can survive in normal house air. That is why this one is in a 10 gallon fish tank. I should move it to a bigger tank this winter.

It looks like it needs more room to grow?

All my other philodendrons are happy with normal house air and the great outdoors.

love your Ph. gloriosum in the ground. do you dig it up for winter or just root cuttings?

I got a small one with 2 leaves, now it's got 3 :), but it's getting larger slowly.

what is this one on 3rd from bottom pic, with very narrow leaves? don't think I've ever seen that one before.

you said you don't keep houseplants, so you got a sep lamp set-up or sun-room?

you have a lot of plants!

The Gloriosum is in a 16 inch bowl with another philodendron or two. This year it got tangled up with Asian jasmine so it broke in several pieces when I was bringing it in to the basement. I have those pieces in a pan with some other begonias trying to root. I don't plant any sensitive plants in the ground here unless I intend to leave them all year. I do dig up my banana plants though and did dig up dahlias that were in large pots. Everything else stays in the pot it is in and brought in to the basement for winter.

The narrow leaf plant (3rd from the bottom) is another philodendron but don't ask me the type. I trade with a woman in KY - begonias for whatever she grows.

I don't keep houseplants? Well considering the basement is fairly full with them, I'm not sure what and where I said that. Maybe my remarks meant I do not keep many plants on the main floor. I run around 90 shop lights in the basement. I have X-10 controllers but have no confidence in them so I go downstairs in the morning to turn them on and turn the few I have on at night off. Then in the evening I go back down and reverse that. The X-10 do give me some freedom from getting on my hands and knees to reach in to manually turn on if I had mechanical timers. At least mechanical timers would be good for most things until I needed a light on to do any kind of work.

Yes, I have a lot of plants.

B. angularis is so far back to the wall that I just add extra water in the tray for bottom watering.

One of my tightest spots is like a "U" with 3 stands and plants on the floor so I have very little wiggle room to water everything here.

this is a small shelf with two lights (I might have 3 like this) - 4 feet high. Most are 6 feet high and have at least 3 shelves, while some have 4.

I don't count top shelves since they don't hold plants but valuable for other items and also holding the light above the plants on the next shelf down.

big pots go on the floor

Anyway this is just a glimpse into my madness.