Never heard of the product OM - are they readily available?
Generally available Garden Centre stuff I believe Auricula, my pack was a present - it looks like Gromore. You sprinkle a given amount in the bottom of the planting-hole and sit the plant on it, then backfill. The opportunity for a reasonably controlled test is too good to pass up - we'll soon see if it makes any difference...
I'd had Marjorie Fair in a small border for several years, and although it seems to be a very healthy rose, (never seems to get any black spot) I got fed up with the colour so I bought Little White Pet which is neutral in colour and easier to blend in. The rose is looking O.K but it's only been in for 3wk.
old age is not so bad if you consider the alternative
I saw it LG when I was catching up on a couple of episodes last night. I'm going to look out for some next time I'm at a GC. They did mention that it wasn't suitable for all plants and I've just found this whilst scanning about the web "Rootgrow product endorsed by the RHS includes five different types of mycorrhiza, so that it covers, trees, roses, vegetables and shrubs. It does not work with brassicas, rhododendrons, azaleas, heathers, cranberries or blueberries.
"The kiss of the sun for pardon, the song of birds for mirth; one is nearer god's heart in a garden than anywhere else on earth."
I didn't, LG - but from a glance this morning, I'm not exactly overwhelmed...but:
it has occurred to me, too late, that as it promotes rapid root growth, the peak of performance has passed unnoticed and my plants have all sort of caught themselves up... thyme is not exactly a rampant plant, so there must be a point where they're at full potential.
So, what I plan to do is establish a new bed of something - probably herby - with juvenile plants next year, say half a row with and half a row without and see what happens.
Interesting 'exclusions list', Chuck - mainly Ericaceae then. (Had to wiki that).
I was recommended to use it by a friend who is an expert gardener and by the very good garden centre near Cambridge where I bought 3 West Himalayan White Birch and brought them back to France - all 8' of them. Luckily, I have a fairly large estate car. Anyway, I have used it for the birch, 4 prunus pissardii, a mulberry, pomegranate and several conifers. Watch this space! I keep saying I ought to get a smaller car now I am on my own, but my daughters and all my friends in England just laugh and point out just how much gardening stuff I bring back on each trip to England. I have just discovered a really good garden centre 5 minutes from where I live - unfortunately for my bank balance. Up until now this area of France has been a bit of a wilderness as far as anything unusual plant-wise.
OM Iknow what you mean and I look forward to seeing how you get on with the younger plants. FG a GC 5 mins from where you live. Wonder if they will order things at your request for you? Better hang on to your cash card.