did you prewet your media... before planting??? with very high peat media.. if you dont.. its incredibly hard... to keep the moisture content in the proper range ... mostly because you dont know who wet it is.. in the middle of the wad ... whatever you do.. dont give up .. sunflower can be planted in mother earth.. when soil temps are right ... and fully mature outdoors ... ken

Wow, it is puzzling. It doesn't look like an ower-watering issue to me, but since we're not coming up with any more likely possibilities, then it is something to consider. This late in the year, it has likely stopped growing, even in Florida temperatures. Pothos tolerates drying out pretty well, so let the top couple of inches dry between waterings. How long have they been in that soil? Did they grow well all summer? If so, they might be a bit pot bound now, which can cause some dry spots in the soil, or some roots to become so restricted that they aren't able to draw enough water. It isn't the best time of year to re-pot, especially if something else is causing the problem, but you should at least check this. Can you pull the entire plant out of the pot with the soil and rootball intact? If so, a photo would help us. Check the root ball and medium for dry or mushy spots, for discolored or necrotic roots, for root parasites, crowding, etc. A few, small disrupted places in the root ball where you dig in to check the condition won't hurt it, even this time of year, and if it's very pot-bound, you can plop the entire thing into a larger pot of soil until the spring when you can do a better job or repotting, detangling, root-trimming, and so on. What parts of the plant are affected the most? Were the oldest/lowest leaves on each stem affected first/worst/most, or is the damage worse on the younger, more tender leaves? Are there any parts of the plants that aren't affected? When was it last fertilized, with what, and how often? (Do not fertilize it now- that's the worst thing one can do to a sick plant if the illness isn't due to fertilizer nutrient deficiency.) It might just be lighting, but the plant in the upper photo appears to have an overall yellowish pallor. That would support Tiffany's hypothesis of too much water. Also, I see a yellow leaf near the base of a stem in the second photo near that little sprig of Acacia or whatever it is that's taken root there. Some yellowing is normal, but check through the lower leaves for more yellowing. Too much water or nitrogen deficiency both tend to affect older/lower leaves first. Evenly yellowing lower leaves is more indicative of too much water or poor drainage, while yellowing that begins at the leaf margins is more often nitrogen deficiency. Other things can cause yellowing though, and that curious staining appearance isn't typical of either issue, so don't fertilize at this point. More photos wouldn't hurt: Entire plant Root ball free from the pot Close-ups of the "stains"

Cas Li, Yours is not a maculata but rather a hybrid with maculata in its parentage. The leaf is too wide for its length IMO. Try looking at Flamingo Queen which is a dramatic hybrid from maculata and so many other wonderful hybrids with maculata in it. Go to the International Database of Begonias and do an advanced find. Put in maculata as one of the parents and do a search. This database is a bit fussy so if you do the next page of results, then use the next at the bottom of the page. Do not use the next button at the top of the page. If you want to see each match (make sure it is a cane type) then right mouse click and do an open in a new window or tab. If you left mouse click on any link it will take you there but the back button will get an error and you will have to start again. http://ibegonias.filemakerstudio.com.au/index.php?-link=Home Some hybrids that I've had are Amelia, Matchmaker, Texas Lone Star, and many more. They all have the same genetic flaw though - mildew prone. Here are four I had years ago (Texas Lone Star, Sierra Mountain King, Flamingo Queen, and Matchmaker) Enjoy what you have and don't worry about names unless you started selling any.

i doubt sitting in water for a few hours one day had much of anything to do with all this.. besides .. if that would have caused a problem it would have been a root problems.. and it wouldnt have showed up in a few days ... so its probably the sun problem ... its was stressed from shipping .. the sun stressed it .. its stressed ... get it in full bright shade.. and let it settle down and hopefully it will releaf and get going ... one other caveat.. thats a pretty small pot to ever have the pot itself in the sun.. it might allow the roots to get to hot.. wait for it.. stressing the plant even more ... and being on a brick patio in the sun you might take into consideration radiant heat from the brick ... also.. if it was greenhosue grown.. thats a whole other level of light intensity stress ... good job on the seller sending a new plant.. no matter what happens to this one ... you will have a free plant ... in my MI .. later freezes are a thing.. and a hard hit rose can and will releaf ... if the plant is well established ... yours is not.. but there are still good odds it can recover and come back... if you put it in full bright shade.. and water it properly .. it is not a water loving houseplant .. so do not keep it sodden ... but dont let it go bone dry ... ken