Still flowering but the spathes don't seem to open and the whole inflorescence eventually withers. The plant keeps producing new inflorescences.

I'd like to see those open. Can the spathes be carefully peeled back enough to let the spadices do the rest? I'm guessing it wouldn't be too risky because they are failing anyway. I did something similar to my Philo 'Autumn'(?) but for 2 leaves. One of them was peeled back just today. I also have 2 questions:

What is the perpendicular cow horn shaped bud in the center of the pic on the same plant? It doesn't appear to be a root. Is it a bloom or a new stem?:

(you can see Mosquito bits and diatomaceous earth dust in the pic too)

BTW: This first Philodendron of mine is thriving. I don't have it in direct sunlight which frees up sunny space for my group of overwintering plants.

Thanks for the suggestion, I'll give it a try. The sheath around the new leaf is a "cataphyll". It's a modified form of leaf that protects the main leaf while it emerges. It's a distinguishing characteristic of Philodendrons. The "cow horn shaped bud" I'd agree isn't a root, but also not sure whether it'd be a new shoot or flower bud. Time will tell.

I opened up the spathe but had to place a piece of wood in to keep it open. Now quite a large insect, if interested, could get inside. It's not likely they're self fertile but an insect could bring in some pollen from another plant. The chance of that pollen being compatible with this plant is probably pretty slim. But if nothing happens "they" can't blame me, I've done every thing possible to help it along :)

Thanks about the cataphyll.

That's interesting how you wedged that open. Nice! It reminds me of what locksmiths do to a car window if one gets locked out. It doesn't look damaged either. I like the lemon color.

Tropic those are amazing! I can’t believe it just keeps putting them up.

And Jay, petrushka is right. It seems like it happens a lot especially in winter and I believe it is a humidity issue probably because we are running our heaters. Sometimes, the leaf will never unravel and the plant will just push out a new one that opens.

I hope you’re both well!

I read above about the moisture this morning, then misted a cataphyll that was slightly stuck around a spike for days, then checked an hour ago, and it broke free. Thanks for that. I can't add anything to the pot w/o re-potting so I'll mist new shoots & cataphlls often for now.

All is well here, thanks. There are about 120 Caladium bulbs in my basement that I'll need to figure out how best to pot soon. I may just group each kind in larger shallow pots. They take 2-8 weeks to form their first leaves. I hope to put them out in the ground between mid May and early June. Rabbits chew (but don't eat) the spikes of half of the bulbs I root outdoors so I'm doing that indoors.

Isn't Mother Nature wonderful! She sends many 'helpers' into my garden to stop it from being over populated by plants :(

The inflorescence I propped open with a stick (shown in the photo above) has withered completely. I've propped another open but suspect the result will be the same.