On Apr 3, 2:06*pm, wrote:
I have a west-facing greenhouse wall containing several large house
plants: Rubber plant, Schefflera, Dwarf Schefflera, Dracaena, and
self-heading Philodendron. I've had them all for several years but his
Spring several seem ailing.

The Schefflera is dropping leaves, but from the bottom and the new
growth seems OK. This may be normal, but I've not seen it before. The
Dwarf Schefflera, on the other hand, is dropping from the top. The
branches are bare, the stems are still green, but I can't see any new
growth.

The Philodendron's old leaves are yellowing and dropping, new growth
leaves are much smaller. Overall, it seems limp and droopy. Maybe it
needs more sun, but it hasn't in years past.

I just repotted the Dwarf Schefflera and Philodendron yesterday and
neither was severely pot bound. I've been feeding them Miracle-Gro
every two weeks since new growth started. They are neither over nor
under watered. No sign of insect activity. Rubber plant and Dracaenas
are fine.

Are these problems, or just a normal phase?

Here is the scatter gun approach with follow up questions and
opinions. Hope it helps.

Something has changed - don't think the switch to daylight savings
time had an effect. :-)

That only the Schefflera are affected says it may be normal. They do
shed some leaves I believe.

You said they are neither over or under watered, I don't know if that
means you water a set amount at a set interval or if you also have you
checked pot drainage. I killed a dwarf Alberta Spruce, because the
drain clogged up and I thought the wilting was from too little water
when I had really drowned the roots. But both having drainage
problems at once would be unusual.

What is the heat source for the greenhouse? Is the greenhouse
attached to your home or standalone?

Dropping leaves sounds like too much heat or low humidity, but most
leaf drop happens when heat is turned on in the fall.

Do you regularly feed with miracle grow? I would not go wild with
feeding miracle grow - that stuff is heavy in nitrogen and is not slow
release.

Wes