Alright, author, it's Crit O'Clock.
I did not notice any spelling errors, but I do think there is some room for some extra commas/grammar checks throughout the piece. I do think that you should provide some consistency amongst the addenda collapsibles, as with the last two addenda you have them in all caps, while the first 3 are just "level 3 access required". The clinical tone seems to be fine as well.
Author, in my most blunt opinion, this draft to me feels like it has the potential to be something special, but feels as though it's all over the place in terms of where the piece wants to go. The draft starts off strong, yet it slowly begins to go in paths of varying tone and structure. For example, take this paragraph here:
Genetic testing of samples taken from SCP-XXXX instances return results matching to a large variety of plant species, with each tested SCP-XXXX instance possessing a seemingly unique pattern. Around 7% of SCP-XXXX’s genome matches not to plants but to various species of the genus Capra (goat).
Paired with that, there are several other paragraphs inside of the Description that just feels really unnecessary. The first four paragraphs describe the appearance of the anomaly before finally talking about what the thing does. Why should the reader need to know so much about the physical appearance of this thing? Just get right into the nitty-gritty.
The following addenda really doesn't capture my interest, either. I will say that you have some highly effective imagery in Addendum 1; you had my interest at this part and is probably the best thing the article has going for it at the moment. Addendum 2 wasn't half bad either, but the following regarding the "Black Apple" is part of what began to make this go downhill.
When an instance of SCP-XXXX comes within a distance of 10 to 1,000 meters to SCP-XXXX-A, the anomalous field created by the particular instance greatly increase in size and intensity. SCP-XXXX-A appears to be unaffected by this field and shows no signs of enhanced growth or mutations.
So now we have this tree that can produce these black apples with two effects:
1. Causes the SCP-XXXX instances to have increased anomalous activity
2. Makes humans that eat it become more active sexually for some reason??
I mean cmon. What's the point of the second reason to include that. I rolled my eyes the second I read it.
The following last two addenda seem to reference a backstory for the reason these guys exist, but I'm having a bit of a difficult time putting two and two together exactly what it's supposed to be. Having read addendum 5 over three times as I'm critiquing, I can't bring myself to understand this other than that some dude caused his kingdom to be cursed and they turned into these plant guys?
Not just that, but this is a classic "note at the end" paired with "note written with human blood" tied in for next to no reason. I rolled my eyes incredibly hard here.
Maybe some other reviewer could understand this better, but gee golly am I lost.
Now then, Author. I think that the best course of action you could take to improve this draft would be to edit the draft to be far less complex than it currently is. To be 100% honest, I think that there is a fair bit of this draft that you could shave off and still retain the same effect you're aiming for.
There are more than a handful of strengths this article has for it, however. I think that this concept is really far more creative than most of the drafts I've read on this forum, but I think it needs to restructuring in order to work out better. Your imagery in the test logs is fantastic, I think I'd like to see that angle played up somehow. The backstory could still work, but I think there is a better direction you could take that.
Of course, I am only one person with my own biases. I do think you should look into having other people critique this draft, as I do think there may be others out there that would view this from a different perspective. In my opinion, I would probably downvote this but would change to a novote should some of the things I addressed be edited out.
Best of luck author.