Return to the Organic Rose Growing Forum | Post a Follow-Up

 o
mycorrhizae

Posted by habitat_gardener z9 CA (My Page) on
Sun, Jun 13, 04 at 1:31

Has anyone tried any mycorrhizal products with roses? I have heard success stories using mycorrhizae for restoration projects using California native plants, but have not heard much about garden use.

Ads for Biovam, one of the mycorrhizal products marketed specifically for roses, claim longer-lasting cut roses.


Follow-Up Postings:

 o
RE: mycorrhizae

If you have good soil, you don't need them, as they'll be there anyway. If you have poor soil, you don't need to grow roses until it's improved. Stay away from too much high P fertilizers and avoid overusing the manure and you'll have them naturally in your garden.


 o
RE: mycorrhizae

As HollySprings suggests, if there is much phosphate in the soil, the fungi don't colonize roots. I'm afraid most rose beds already have too much P from manure, bone meal, or superphosphate to get much benefit from mycorrhizae. Conversely, if there are mycorrhizae, very little phosphate is needed for good growth.

I read the other day that the reason phosphate boosts root growth is that it makes the roots less efficient by excluding the mycorrhizae-- so the plant needs to put more energy into root development.


 o
RE: mycorrhizae

Mychorizal fungi are fairly plant specific so its doubtful that what you would "buy" would be what you would need. If you get your soil into good health, add lots of organic matter, and don't disturb the soil those fungi will populate your soil without you doing anything much, so save your cash and use it for something else, such as more plants.


 o
RE: mycorrhizae

There are two main types of mycorrhizal fungi: Endo and Ecto. Endo Mycorrhizal fungi colonize around 85% of all the plants in the world, whereas Ecto only colonizes a few trees and shrubs. There are a handful of plants that require specific types, but roses will form a relationship with Endo. If you plan to purchase, make sure that you know the exact spore count, and not the "propagule" or "viable organism" count. Most of these companies use chopped or ground up roots, but you can find one that has the technology to sell just the spores.
Most of todays soils are lacking in beneficial fungi and bacteria. So unless you are getting your soil from an undisturbed forest, you may want to add your own.


 o
RE: mycorrhizae

roots,

It's true that you can't be sure unless you inoculate. But I found this statement in a technical report: "cultivated rose is normally mycorrhizal." I would guess that grafted roses normally pick up fungal partners in the rose fields and bring them into our gardens. Own-root greenhouse roses from the boutique rose nurseries would lack them and would probably benefit from inoculation if they are to be grown in pots.


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Organic Rose Growing Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here