The recommendation for Jackson's chameleons other than using plain calcium most often, is to only use calcium with D3 1x a month and only use a multivitamin 1x a month, so I would use the multivitamin with D3 1x a month. It already contains calcium, so it should be good as a substitute for the 1x a month D3 with calcium.
Jackson's are known to develop problems when oversupplemented--usually visible as gular edema which is merely a symptom of internal problems.
Remember, chameleon nutrition is not yet an exact science and the best way to ensure your cham's receiving enough nutrients is with a variety of well-fed feeders and the multivitamin plus D3 then act as a bit of insurance to prevent deficiencies.
Veiled chams are known to enjoy greens and it would help save your plants if they are offered some nutrious greens daily.
The caresheets states:
"Some chameleons, most notably veileds, may occasionally eat vegetation in addition to insects. That is why it's very important to keep only non-toxic plants in chameleon cages. The same vegetables used for gutloading can also be offered to your veiled chameleon to snack on. Leafy greens, sliced vegetables and fruit, and berries can all be attached to cage furnishings with a clip or placed in a feeding cup for easy feeding."
Hopefully, some veiled owners will add their thoughts about umbrella plants and Veiled chams.
You might also be able to find some more info by searching past posts.
If not, a new thread might generate more replies.
Here is what I have found about umbrella plants--which can refer to more than one plant, so you'll need to determine which one it is:
Schefflera arboricola is one plant that is commonly called an umbrella plant but there are also others, such as Schefflera actinophylla which is considered too toxic for use with chams.
and here is a short video of her hand feeding after only 2 months she no longer hides or scares it great sometimes when I open her cage she rushes out to come be me then goes for her tree lol
click on picture
and one more pic showing my tanks I have the male on the left my ball python in the middle and the female on the right next to the tree I will upgrade there tanks when they get big enough
and one more pic showing my tanks I have the male on the left my ball python in the middle and the female on the right next to the tree I will upgrade there tanks when they get big enough