No problem BUT why not give it a try. Use it on a dispensable stick/tree and see what happens.
Sometimes we assume it will not work but it actually may.
The rapid development of this tree is amazing, you're giving me a case of "Climate Zone Envy".
Our growing season averages around 120 days, give or take. So far it has already been over a year since my local airport has reported 2 consecutive 90 F days, we are having a very cool summer, which I actually don't mind. Haven't had to turn on the air conditioning. Yet. It may get hot later this summer, who knows.
About organic soils. I have tried mixes with more organics, they don't work for me. I found the only way to guarantee that roots survive over time is to use nearly 100% inorganic. Local climate is critical, up here in the north, we have a long wet autumn and winters. Pines especially tend to rot roots off in our winters. A 1/3 organic or more soil would work ok for landscape nursery gallon pots, with watering only once a week during 'dry spells'. This spring and summer we have been averaging rain 4 out of 7 days a week. I don't need to water every day. Some trees are staying too wet even though they are in 100% inorganic media.
In Texas, where rain can be infrequent, humidity is low and the temperature is hot, a media with lots of organics might work just fine. May even be preferable to the inorganic mixes used in wetter parts of the country. So to all those who are still exploring changes to their potting mixes, remember to keep local climate in mind when choosing your next mix to experiment with.