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Dioon holmgrenii

Very rare both in the wild and in cultivation, this large cycad grows in pine-oak-forest in the mountains of Oaxaca, Mexico. Its sturdy trunk can reach 6 m (20 ft.) tall and 40 cm (16 in.) in diameter and is topped by a large crown of stiff, long, flat leaves that are densely woolly when young. Easily grown, it will do well in a subtropical or tropical garden. We have only a limited number of seeds available.

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germination comments by our visitors
For general germination instructions click here.

Also see plant cultivation comments below.

Seeds from this species ...

... are difficult to germinate and need up to 6 months to sprout.
Difficult to germinate, it took more than 3 months to germinate and the germination rate is very low. I had 100 seeds, and only 25 germinated. The seeds was immersed in water for a day before planting, I use pure Vermiculite as the media, moist the media once a week. The first germination was after 3 months.
Submitted on 26/02/2011 by one of our visitors

... are very easy to germinate and need up to 3 months to sprout.
My seeds from RPS were soaked overnight and placed on damp spagphum moss in a propagator (a very basic thing with a heat bed, keeping the temp around 20C) Within 2 months all 10 seeds (100%!!) had germinated and were potted up into deep pots in the shadehouse... less than 6 months on and im just starting to see the first leaves forming. Am very happy with the result!
Submitted on 14/12/2008 by Lans hansen

...difficult to germinate and need up to 3 months to sprout.
I put the seeds in a closed plastic container with a mix of half:half dry and moist Perlite. Seeds only half buried in Perlite, pointed side up. Most germinated within a few months (over 50%), but survival rate after potting in very well draining compost was low since they rot very easily and don't grow the first leaf for ages. Two survived to produce one leaf after about one year. Now after the second year they still have only one leaf but it looks like they are preparing for more growth next year.
Submitted on 08/11/2005 by one of our visitors

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plant cultivation comments by our visitors
Also see germination commnets above.

Plants from this species ...

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If you wish to read more on palm cultivation, we highly recommend Ornamental Palm Horticulture by Timothy K. Broschat and Alan W. Meerow, available in our bookshop.

Ratings and comments reflect individual experiences and the views of our visitors. They do not necessarily describe the most appropriate methods, nor are they necessarily valid for all seeds or plants of this species. Germination and plant cultivation success depends on many different factors; nevertheless, these experiences will hopefully aid you in your effort to get the best germination results from our seeds and the best growth results from your plants.

We recommend:
The Encyclopedia of Cultivated Palms

The Encyclopedia of Cultivated Palms
by Robert Lee Riffle, Paul Craft, Scott Zona

2nd edition
Completely revised and updated

Hardcover - 528 pages
11 x 8.5 inches

Our rating:
Suitable for: all

The Encyclopedia of Cultivated Palms is the definitive account of all palms that can be grown for ornamental and economic use. Palms are often underutilized as a result of their unfamiliarity—even to tropical gardeners. To help introduce these valuable plants to a new audience, the authors have exhaustively documented every genus in the palm family.
825 species are described in detail, including cold hardiness, water needs, height, and any special requirements. Generously illustrated with more than 900 photos, including photos of several palm species that have never before appeared in a general encyclopedia, The Encyclopedia of Cultivated Palms is as valuable as an identification guide as it is a practical handbook. Interesting snippets of history, ethnobotany, and biology inform the text and make this a lively catalog of these remarkable plants.

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