This red trumpet vine was delivered a few days ago. I put it in the largest planter I had (it's about knee-high and 24" in diameter), hoping that it will do alright for a few years in there. I didn't put in the ground because I want to be able to control its growth.

No flowers right now and some of its leaves are turning dark and others seem a bit too light. Is this normal?

Is the red trumpet vine evergreen in zone 10 (sunset zone 23)?

If this is Campsis radicans and you live in the Cali equivalent of zone 10a you are very wise NOT to put this into the ground. It can become quite invasive. I have one that I foolishly put in the ground in my greenhouse in 2003. It has a trunk that is about 6 inches in diameter. Yes, it is evergreen. I have to cut mine down every year. They bloom in the fall. About now. Mine always bloom in November. I have tried to eradicate it without success. It sends out runners everywhere and pops up in all sorts of places. I have been unsuccessful in digging out the main rooted trunk. They are beautiful and hummingbirds love them, but don;t let it escape that container!

When was the last time phosphorus potassium nitrogen or lime been added to the soil. The most common nutrient problem with yellowing of leafs is chlorosis which is lack of iron, but yellowing may also be caused by manganese, zinc, or nitrogen deficiencies. Is the pot kept evenly watered, some planters can create a non porous area in the soil starving the roots for any water or nutrition.That to could be the problem as some areas are not getting water ...too much water ot not enough water can cause the leaves to yellow and turn brown.
It depends on the cycle your seeing over a few weeks which condition or conditions fit the issue you having. It's hard to diagnose this in just one pic. How long has the plant been in the same pot and or it could be root bound and the soil is depleted of any nutrients . Every time a potted plant is watered it's a good practice to add 1/2 the recommended amount of liquid fertilizer due to the neitrients leaching out the bottom of the pot. Every year it's a good practice to add 2-3" of compost to each potted plant and check for root bound and root weevils. My trumpet is in the ground in a large seperate planter of built up with soil from compost collected yearly. It's a large compost bin. Every year I add all the leaves on top of the whole area and by spring the 2-3' of leaves have fed the soil and all the plants including the trumpet vine have nice green leaves and flowers .

bumplbea said:When was the last time phosphorus potassium nitrogen or lime been added to the soil.

As I said when I started this thread, I got this vine just last week from the nursery (Armstrong) so I have no idea when the last time the nursery gave this plant phosphorus, potassium, nitrogen, or lime was.

bumplbea said: Is the pot kept evenly watered, some planters can create a non porous area in the soil starving the roots for any water or nutrition.

I just put it in that pot. Was the vine properly watered at the nursery? I can't answer that.

bumplbea said: It's hard to diagnose this in just one pic.

I posted four photos...

bumplbea said: or it could be root bound and the soil is depleted of any nutrients

Not root bound at all. The roots looked healthy.

bumplbea said:Every time a potted plant is watered it's a good practice to add 1/2 the recommended amount of liquid fertilizer due to the neitrients leaching out the bottom of the pot.

Fertilizing once a week? Isn't that too often, especially now that the weather is in the 60s and, the days are shorter and the sunlight is much weaker?

@Gina1960, the vine I have is not Campsis Radicans but "Distictis Buccinatoria" (a.k.a. Bignonia Cherere or Scarlet Trumpet Vine). I just watched a video and this one is also a very fast grower, invasive vine. I will keep it in the big pot and see what it does.

Most of the Scarlet Trumpet videos I watched show plants with nice and shiny green leaves so I think that the vine I got has probably been overwatered at the nursery or maybe that's just the way it's supposed to look in the fall.

Good to know what you have!