I'll look forward to your observations. You'll need to fertilize a little more frequently in the gritty mix because it drains so well, so keep that in mind.
Tip: Try to remember not to fertilize container plantings when soil temps are below 55*. There are 2 reasons for this. The first is that plants won't be doing much growing & will use little in the way of nutrients. The second is that if you are using a fertilizer that supplies it's N in urea or ammoniacal form, urea is either converted to nitrate-N in the soil by bacteria, or it is taken up directly by the plant. The plant can store large amounts of N in nitrate forms, but cannot store much N in a the ammonium form w/o symptoms of ammonium toxicity - especially when cool soil temps or soggy conditions inhibit the bacteria that convert the urea to nitrate form. In short, it's best to withhold urea-based fertilizers if there is a chance soil temps will be below 55*.
Al
