It looks like the G. scriptum, they do like a lot of sun. You've done well with it. I have the G. speciosum but it hasn't flowered yet.

I agree with you it probably is G. scriptum. But it was a rescue and no tag. I didn't expect it to be so big.

This is definitely not a living room orchid!

Jane

Grammatophyllums are mostly very large orchids. Check out this G speciosum in a botanic garden that had to be "repotted". It weighed about 300 pounds. Definitely not a living room orchid. That's why I have mine on a large tree stump.

How about a close-up of one flower?

From memory, ages ago, there was a Grammatophyllum awarded in the Northern Territory and the orchid judges had to visit the orchid. Never seen one in bloom because it needs tropical conditions and would outgrow most glass-houses.

Jane. Why not the pot inside of a pot. At least 2" bigger or more.

Harvey, its already in two pots. I can barely lift it now.

It doesn't send out aerial roots. It likes moisture and stays in the pot, like Oncidiums. I took a look at it and its making new growths and they are quite big. I'd damage roots if I try to repot now. Not sure when to repot this, probably over winter.

I'm not too worried about about the plant dying as it looked dead when I got it. It was leafless and most of the roots rotted.

I really need to crack the pots it is in and either pot it in the ground or buy a very large clay pot which it will have to spend its life in.

Jane

Mine started off in the ground but got too wet and too shaded. Nearly lost it before I researched it some more then decided to put it onto a large tree stump. The stump is about 2.5 metres tall and at the top nearly a metre diameter. It started off with morning shade and midday/afternoon full sun. There are 8 stems, 2 of which are leafless

However, everything around the stump has grown, including some self sown (bird sown) Macarthur Palms. So they're getting more shade now. I trim the palm fronds back occasionally, looks like I need to do it again soon. Also have to trim back the Philodendrons and Epipremnums. Gardens are never static. You set things up a certain way and then everything tries to get in on the act, LOL.

Eventually the stump will rot and collapse, hopefully not before the orchid has flowered. Afterwards, I should be able to retrieve a lot of new plants from the collapsed heap and start again. That's my plan, anyway.

Not sure what to do with it. I’d like to know how people grow this. I could try to divide it, but the bulbs are heavy and the whole plant is heavy. I think a permanent spot is necessary. Maybe a concrete pot.

Counted7 spikes. Wild ferns keep growing in with it. It is like a shrub.

If you are willing to consider a concrete pot then the pot in pot idea is still good. You could use the concrete pot or another. Being able to lift it must not be important if you are considering a concrete pot. And even if I could lift it why do that? It may need a moving blanket and some plastic for cold weather. Choose the best spot and let it grow.

It’s already in 2 pots, I’m not putting it in another pot. The pot you see in photo is a thick clay. I purchased it to keep the plant stable. It is not a normal clay pot, it’s thick and quite heavy.

I'm thinking of a permanent placement, thus cement. It came through the cold weather fine. I never covered it.

Its getting too large and the spikes are so long, it needs a place for itself.

Thanks