Both Brugmansia & Datura are in the same family of Solanaceae. Brugmansia grow into trees, produce brown wood and are perennial in warmer climates. 99% of their flowers point down and are usually called Angels Trumpet. They produce green bean like seed pods. Datura are annual bushes (except in climates with no frost) and do not produce brown wood. Their stems and trunks are almost always green. Their flowers point up and are mistakenly called Angels Trumpet but are acutally Devils Trumpet. They produce round, spikey or bumpy seed pods that can literally explode when ripe throwing seeds all over the place if the pod is not well hydrated.

after googling "glyphosate salt", several links came up supporting lou. sorry DS, lou wins this round :) If we're keeping score, the fair thing would be to google glysophate salt and also to google glyphosate acid. Whether you use quotes or not, you'll get about twice as many hits for acid as for salt. I've done a little reading, and technically, glyphosate is an acid, but it can be used in salt form. Here is a link that explains it fairly well. Strictly speaking, glyphosate is an acid, but some glyphosate based herbicides use a glyphosateate based salt. The wikipedia article Deerslayer linked mentions that it is sold in formulations as a salt and as an acid. Everything I've read on the matter leads me to believe that Deerslayer is correct in saying that glyphosate is an acid. It can be sold in a salt form, so there is some validity to Lou's statements, but technically, glyphosate is an acid.

FWIW, after more research my best guess is that this was Field Pennycress in it's initial sprouting stage. Went ahead and removed the weeds before laying down mulch https://hvfarmscape.files.wordpress.com/2013/04/brassica-field-penny-cress-thlaspi-arvense-7901.jpg http://www.pestid.msu.edu/wp-content/uploads/2014/12/Field-pennycress-rosette.jpg

Hi, your questions are hard to answer as it is more about design than a technique. Design is personal and therefore there is no real answer although there are basic guidelines. For design, I would take a moment and search for Miami garden or Florida garden on the internet and then bookmark the images that "speak" to you. Then, go back and look at the bookmarked images - what do they have in common? Try to capture that feeling in your garden. Alternatively, go for a walk around your neighborhood or a nearby one and look at the gardens. What features really stand out? Do you see other's with hedges? How do they look and how are they used most effectively? For the new flax you planted, I would just mulch over it and it should look neat. If it has weeds that are hard to suppress, a layer of cardboard under the mulch will help. Be sure to water after applying. For boxwood, it lends a formal feel and structure. You have structure from the fence, paths and edging. Do you want more? Only you can really can really answer that.