Does Anybody Feed with MirAcid?

[PleuroPal]

I was advised to use it by someone I really trust, but I was just curious that I'd never seen it mentioned here. Appreciate any feedback.

Thanks!

[Izzie]

I've heard of some orchids liking a little acidity, but I have no idea about this brand, I've never heard of it.

If it's someone you trust, I'd say take a look at the plants they're using it on and judge for yourself.

[Izzie]

Here's an article where that product is mentioned in adjusting pH and growing orchids: THE MEANING OF pH

Took the time to read it, and it's fascinating. Sounds like the author really did their homework. I wonder what your friend would think of it?

[Ray]

Mir-Acid (30-10-10) was invented by Dr. O. Wesley Davidson of Rutgers University many, many years ago in response to nitrogen deficiency caused by the microorganisms that break down bark.

Keep in mind that a lot has changed since then. For one, most bark-based media are changed more frequently, so the breakdown is less of an issue. The bark itself is typically treated in some way, which can reduce the microorganism population. We also use less "from the yard" additives - dry leaf litter used to be a staple, and that certainly dragged "bugs" into the medium.

As we no longer typically have to deal with a nitrogen deficiency, the use of Mir-Acid will end up being the application of excessive nitrogen, which can stop blooming altogether, if used continuously.

Personally, I use it on my azaleas and rhododendrons only, but if you use it during early growth periods, then switch to a low-nitrogen formula as the growths mature, it should be OK to use on orchids. I'm too lazy to track the need for formula changes, and with my varied collection, things are never in growth-cycle synchronization, so i stick the the MSU formula year round.

[PleuroPal]

Thanks for the responses, they were very informative.