Paul Licht
Wed, 08 Jul 2015 08:20:56 PDT
T. grandiflorum is an eastern US plant.  We have been growing it
successfully (it comes back) in our Eastern N. America collection at the UC
Botanical Garden. It has not spread extensively as it does in habitat. On
the other hand, our T. chloropetalum and albidum (not easy to distinguish)
have thrived in our native California collection, especially under oaks. As
Ben Anderson mentioned earlier, it gets minimal supplemental water. I've
started lots from seed but don't find it easy to raise them to maturity;
takes many years.


Paul Licht, Director
University of California Botanical Garden
200 Centennial Drive
Berkeley, CA 94720

On Tue, Jul 7, 2015 at 10:18 PM, Travis O <> wrote:

> I've seen Trillium grandiflorum growing wild here on shady southeast
> facing banks. They receive practically no direct sun while in growth.
> Summer gets no rain here for around three months.
> I've seen sources list Trillium grandiflorum to live in zones 3 to 9. I
> wonder if you grew it on the "cool" side of the house (North side?) in deep
> shade and plenty of water it would be happy?
> One technique you may employ for water retention in a dry climate is a
> trench bed. A deep trench, around a foot deep, would capture more rainfall
> (if any) and irrigated water while the sides protect the plants from drying
> winds. The bed is dug, the dirt taken out forms the walls. I believe it is
> how they grow things in the driest parts of Africa. I've tried this in our
> vegetable garden, it works well. Our recent summers have been three months
> of rainless 100 degree days, putting the technique to the test!
> Travis Owen
> Rogue River, OR
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