Okay, this is just my interpretation, and I may of course be wrong, but here is what I think he's trying to say, based on the meanings of the words etc.
One of the first things I noticed was that some of the phrases and words were underlined - perhaps he wants you to read only the under-lined ones? Or only take real note in the underlined ones?
I am looking up all the words in the dictionary as I go, as I believe (from reading it through) that he would want to have the absoloutely correct definition of the word - dunno why, just strikes as something he would do...
Actually, it's the first line that strikes me as very weird and very creepy.
Propagate means to breed of reproduce a plant. Then it says good people after it. The propagte is in quotation marks. All of this says to me that he wants to ...err... "breed" people he believes are good - not trying to scare you or anything but, he probably means you.
With the symbiosis, I think he's trying to say that he gets his kicks from seeing you every Saturday, and thinks perhaps that you, in some twisted way, benefit from him. The bit after this explains it a bit.
The care bit may seem simple anough, but when you come to look it up, it seems to get more sinister. I'll type it up, but not including examples as it just confuses from what I'm trying to get at.
care noun 1Serious attention or thought 2caution to avoid damage or loss 3protection, charge, supervision 4 worry, anxiety
And then it goes on a bit. If I am right in thinking he would probably take the frist definition, then it sounds a bit weird.
You've said the the symbiotic is the same thing really, so I'll leave that bit out.
I believe the whole "photosynthesise" (which, BTW, he spelt wrong, it's actually photosynthesize) links in with the daisy. It being about light anf the daisy bit being about day - but more about that later.
Grow also has several meanings, which can be seen below:
1. Increase size or quantity; become greater
2. Develop
3. Be capable of developing as a plant, flourish
4. Become gradually
5. cause or allow to grow, produce by cultivation
Any of these could be used or interpreted, although I don't think, that for this word he used a dictionary definition entirely. I think possibilities of meaning lie in: 1, 2 or 3.
Do we not means simply, we do grow, don't we? (Or that is how I choose to interpret it).
Potential is there to grow.
The customer bit worries me a bit too, but not too much. It could be just that he is making sure that you know which customer he is, but the second definition is "a person one has to deal with". Could this mean you "have" to deal with him?
The rest, I haven't done, and at the moment I can't be bothered to. I might do it later, if I have time/can be bothered (sorry!).
But yeah, in my opinion, I'd be worried.