I'm curious about this one. So it's not red patches first then becoming brown? They're happening separately? Is the red discolouration mostly in the white part of the leaf pattern? Can you post some close ups of individual leaves?

Hopefully someone will know!

I had the brilliant idea that maybe this was the Ruby variegated cultivar, where the light coloured parts are supposed to be slightly pink, and that giving it more sun had intensified that colour, but looking at your photo again I doubt that's it...

Could the red patches be sunburn? Did you expose it to more sun outside gradually? I think the brown edges are a different thing, such as the soil might be remaining too wet after being repotted. There's tons of information on that issue on this forum, try searching that topic.

I think that I did over water when i first repotted resulting in the rusty spots but i think the red is different. It's been there a while and not turned to the rusty colour. It could be sunburn but the top leaves didnt burn.

Overexposure to sun affects plants differently than people/animals. In plants, overexposure causes a hyper-excitement of molecules in the plant's epidermal layer. As the molecules return to a less excited state, they release the same O- free oxygen radicals that are found in H2O2 (hydrogen peroxide). These free radicals attack pigments that are most susceptible to exposure, primarily chlorophyll, and oxidizes the pigment molecules. It actually bleaches/oxidizes the pigment by way of the very same mechanism that H2O2 bleaches hair, which is why the scientific name for sunburn in plants is photo-oxidation. The most common result is an initial gray or silver appearance of affected tissue that soon turns brown or black. You should look to something other than sunburn for the cause of the pinkish coloration.

Sometimes a P deficiency can cause expression of the pigment anthocyanin, but a P deficiency is not the only suspect cause of purple leaves. Nearly any environmental condition that puts the brakes on growth (and the accompanying use of food (sugars), but does not limit sugar production (photosynthesis) can cause anthocyanin buildup and purple leaves.

Very often too, when the more central part of the leaves are purple, an overly high level of Ca in the soil can be the suspect. Soil saturation also blocks uptake of P and Mg, which in concert can cause expression of anthocyanin in leaf tissues.

Al

Very interesting Al, thanks for that explanation.

Angela, what do you think? Something to look into?

Under over sunlight exposure, healthy ficus will make their leaves curved and straight up closer to the trunk to minimize exposure, then what Al explain above happens.

If the leaves still open wide normally, not try to cover itself from sun, then nutrients deficiency have bigger chances to be the cause. If the sign mainly visible on older leaves like above, this deficiency maybe the cause:

Potassium(K) - Older leaves show interveinal chlorosis and marginal necrotic spots or scorching which progresses inward and also upward toward younger leaves as deficiency becomes more sever.

.. that i copy-paste from edu site out there.

Does anybody maybe know what these brown scabs on the vein of my pant is? they are not bugs or scale. hard little calloused brown spots. is it oedema? The plant gets bright filtered light and i water it once the soil is slightly dry, it is sitting in a container within a container so i never really tip out excess water.

Looks like scale to me. There are different types. Have you tried scratching them off using alcohol?

I agree with Casey, it looks like scale to me, too.

Hi guys - thanks for the reply. i have tried to remove it with some rubbing alcohol and nothing - even tried to scratch it off with my fingernail and it just left a fleshy green patch behind - its really more of a scab?

It takes some persistence to rub the scale off with the rubbing alcohol.

Their pattern of spread also indicates scale insects. If they are dead, the scales wipe off easily and if they are alive, the waxy cuticle takes some gentle rubbing with rubbing alcohol to remove them.

When you remove one and smoosh it in paper (toilet paper, papertowel), it should leave a red/brown streak. That's their insides. Ick, right?