Anyone growing petrophytum?

[Weiser]

Claire
What a great way to compare Their growth habits. Thank Pat and Don for sharing there wonderful photo.

Aaron
I'll acclimate them in slowly. 

[Merlin]

Rock Mat, P. spp. are good(easy) plants for the rock garden, they are moderately slow growers so they are well behaved in this respect.  I have grown three species of this plant but I find P. caespitosum is the best of them and have reduced things down to this species. I like the way they form around the rocks where other plants would struggle. The plants smother themselves with not particularly attractive flower spires in late spring, unfortunately they produce a ton of very fine seeds that pop up everywhere though this is little problem since they so grow slowly and can be easily dealt with. I have taken to shearing these plants as soon as the seed set starts so they don't take over the place. I took some pictures this morning.
P.caespitosum



Two year old volunteer trying to make a go of it

[DesertZone]

Welcome!

Those plants look great.  I can never find any seedlings around outside, but they are easy to sprout.  So small the seedlings are they almost look like the start of moss.

Looking forward too more of your pics.

[Bundraba!]

 Yes! Great plants! I've put seed of the first one on the seed-x. A seedling actually appeared in the scree under the plant: amazing given the size of the things and that they naturally grow on solid rock. This was purchased years ago. The next is one I collected in S.E. Idaho on fractured rock. This enabled me to get a small rooted start, normally impossible for these plants. I call this "june rock mat" because it blooms a full month before the other plant. It is a very nice thing being a bit more glaucus than the first. I'm offering it the entire south face of "The Rock" if it wants it. I've never seen any seed. The third photo is Kelseya. Three seedlings (2009 seed) went into last winter apparently alive. Three seedlings have returned this year. This looks to be the best of them. I will grow this plant.

[DesertZone]

Very nice!  Those are some awesome plants.

[Bundraba!]

Petrophytum caespitosum in late August 2012 and an update from the Kelsey Cam 
 

[DesertZone]

Never gets old seeing new pics of petrophytum.

[Tim Ingram]

I think I must replant my Petrophytum, that plant shows how it should really be grown! How old is it? They seem pretty slow growing and to see one flowering so well is great.

[Booker]

Going back to 2007 for my contribution to this very interesting discussion. We were lucky enough to hike the Methuselah Trail in the Owens Valley in California in June that year and we were fortunate to see these magnificent cushions.  The final image was taken in Zion NP on the same trip.

[Bundraba!]

Tim, it's at least thirteen years old from a start (SRPN?). I planted it well before I "knew" much about alpine gardening. The Kelseya is just a baby. It is only two!

[DesertZone]

Booker,
Those are amazing pics! thanks for sharing.


Here is an udated pic of mine.


And my seedlings.

[Bundraba!]

January 31, 2013 update from the Kelsey Cam. Record warmth for the date (55F.) removed all of the snow this little Kelseya has been resting under for a few weeks. Still 2 plants alive on the garden!

[cohan]

Wonderful plants, all! Cliff- those wild grandmamas are most impressive!