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#81
General Discussion / Re: Bulbs and pre-emergent her...
Last post by MarkMazer - June 25, 2024, 11:01:57 AM
 "applying the persistent pre-emergent Casoron now and having the area covered with a bark mulch"


Would not the bark mulch extend the herbicide's soil persistance past the often quoted 10 months?

Mark Mazer
Hertford, NC
#82
Current Photographs / Re: June 2024
Last post by Robert_Parks - June 25, 2024, 06:22:45 AM
Quote from: Uli on June 25, 2024, 12:57:57 AMThank you for posting the pictures of flowering potatoes. What are they? Local cultivars of edible potato? Or wild species? I know that the edible potato originated in the Andes of Peru and Bolivia but I am not aware of native Californian ones. How does the whole plant look like?
I managed to acquire a species potato Solanum jamesii which looks like a white flowered mini potato plant. For safety reasons I keep it in a pot, because of bulb/tuber eating rodents and also because I know of a botanical garden where a purple flowering species has invaded the whole garden.....
Genetics based on cultivated Andean potatoes. Virtually all of these are from seed of selected cultivars sourced from Cultivariable in Washington state, USA. In general, my choice was for plants suited for cool summers, late tuberization (after fall equinox), and strong dormancy.
Plants are generally sprawling and very vigorous, a few clones grew tall and upright this spring (it was very dark and cold for a while). A few seedlings in a planter are now a lush mound a meter across (seed planted in April). Flowering and seed set is generous the local pollinators do buzz pollen collection. Everything is in planters, and escape us unlikely, given the local conditions.
#83
Current Photographs / Re: June 2024
Last post by Uli - June 25, 2024, 01:12:37 AM
Lilium Vico Gold 
Raised by Sir Peter Smithers as Lilium sulphureum as one parent, this was once only available in the trade. It is very tall and needs careful staking and is best in shade in my climate. It is fragrant.
However, I sometimes wonder if I have not been sold the hybrid African Queen instead. The apricot touch makes me think this. But I am not a Lily specialist, is there someone around who would be able to tell them apart?
#84
Current Photographs / Re: June 2024
Last post by Uli - June 25, 2024, 12:57:57 AM



Hello @Robert_Parks,

Thank you for posting the pictures of flowering potatoes. What are they? Local cultivars of edible potato? Or wild species? I know that the edible potato originated in the Andes of Peru and Bolivia but I am not aware of native Californian ones. How does the whole plant look like?
I managed to acquire a species potato Solanum jamesii which looks like a white flowered mini potato plant. For safety reasons I keep it in a pot, because of bulb/tuber eating rodents and also because I know of a botanical garden where a purple flowering species has invaded the whole garden.....
#85
Current Photographs / Re: June 2024
Last post by Robert_Parks - June 24, 2024, 03:19:15 PM
Quote from: Martin Bohnet on June 24, 2024, 11:54:46 AM@Robert_Parks love that blue potato. I once tried blue-fleshed potatoes, but they flowered pale lilac for me.
Flower color is not strongly linked to tuber/flesh color in potato, although if stem color is also unpigmented, it isn't going to be a bright potato. It is fun playing with these, the diversity of resulting tubers from more less focused seed.

Robert
Clear, brisk, and windy on the hill in SF.
#86
General Discussion / Bulbs and pre-emergent herbici...
Last post by janemcgary - June 24, 2024, 02:03:13 PM
I'm in the process of renovating a part of the bulb lawn. Near the street where people park weed-dispersing cars, it acquired an infestation of Geranium lucidum (shiny geranium) that could not be stopped except by killing the whole area. I'm thinking of applying the persistent pre-emergent Casoron now and having the area covered with a bark mulch, then waiting to see if the weed reappears next spring. If it doesn't, I'll replant with low shrubs and bulbs. Does anyone know how Casoron might affect bulbs planted about 14 months after application?
#88
Current Photographs / Re: June 2024
Last post by Rdevries - June 24, 2024, 11:45:47 AM
Bessera ramirezii , recently separated from Bessera elegans

https://www.biotaxa.org/Phytotaxa/article/view/phytotaxa.512.4.2
#89
Current Photographs / Re: June 2024
Last post by Rdevries - June 24, 2024, 11:43:15 AM
Stenomesson flavum, coll. north of Lima Peru, van der Werf et al. 14458
Winter leaves, mid summer flowers
#90
Current Photographs / Re: June 2024
Last post by Arnold - June 24, 2024, 05:54:12 AM
Arisaema candidissimum