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Topics - Peter Kohn

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Seeds and germination issues / Cold and Germination
« on: January 27, 2018, 09:37:50 AM »
i find it interesting that two seeds collected in 2015 which failed to germinate last year have germinated successfully this year. Both times sowing was in mid-November. I have also had good germinations this year of other species sown at the same time. This year we have had some colder nights than in any year since I started to experiment with November sowings. My overall experience is that I succeed best when I avoid heat and i am wondering if there is a case for a spell in the fridge to break dormancy.  Does anyone use this approach ? Scottish members may get colder winters than we have had recently in Sheffield so may not find it necessary.

General Meconopsis Forum / Chinese Alpines formerly
« on: December 01, 2017, 03:29:43 PM »
Discovered today that the new seed list is now on line at

Some very pricey items but quite a lot of Meconopsis.

General Meconopsis Forum / Wikipedia entry on Meconopsis Genus
« on: November 23, 2017, 08:37:27 AM »
Following up on checking the entry on Meconopsis cambrica I checked the Wikipedia entry for Meconopsis which could do with being updated. Should the group nominate someone to do this ? Perhaps Jim Jermyn or Geoff Hill ?

General Meconopsis Forum / Meconopsis cambrica
« on: November 23, 2017, 08:32:24 AM »
I checked this morning about the current status of the name Meconopsis cambrica. Both the Plant List and the Plant Finder have now changed the name to Papaver cambricum and I have this morning added a line to that effect to the Wikipedia entry. Maybe someone with more taxonomic knowhow than I have could check that what I have written is acceptable. Where does the group stand on the name for this species. Do we still prefer Parameconopsis cambrica ?

General Meconopsis Forum / MGS#1
« on: November 20, 2017, 01:02:12 PM »
This form of M. baileyi was offered on the seed list this year. Only got very tiny amount of germination but the plants have grown on well and right now they are still in reasonably full leaf when normal forms of M. baileyi and also 'Lingholm' have gone right back. Ian Scott has no further information so I wonder whether anyone else in the group knows anything more about this plant. Could it actually be a hybrid ?

General Meconopsis Forum / Thompso and Morgan
« on: October 08, 2017, 08:31:13 AM »
I was interested to see that T&M are offering 'Luxurious Designer Poppies' in their Meconopsis 'Union Jack' Collection. One plant each of (Meconopsis betonicifolia, Meconopsis Napaulensis, Meconopsis betonicifolia 'Alba') in 7cm pots for £9.99 reduced from £35.97.

This raises a number of questions.  How can they be sure that the white plant is white ? (Our seed-raised plants from M. baileyi alba have a high proportion of blue progeny).  Are they raised by tissue culture ?  Does this explain why the plants are so small ?  And being so small, will they survive the winter ?   We have always followed James Cobb's advice, given more than twenty years ago and tried to build up large strong plants before winter. We will be selling our large, multi-crowned M. baileyi plants in 2 litre pots at our final plant sale in Sheffield Botanic Gardens this afternoon (for £5). What do others think ?

Seeds and germination issues / Adenophora nikoensis var linearifolia
« on: June 25, 2017, 09:15:48 AM »
Apologies for posting this here but I obtained seed under this name from this year's Meconopsis Group seed distibution.  We had good germination but the resultant plants do not have the narrow leaves we expected. If the member who sent the seed to Ian reads this, please could you tell us more about the parent plant.

General Meconopsis Forum / Meconopsis for Gardeners
« on: June 17, 2017, 04:03:21 PM »
Am dithering about buying a copy as I was told that I might get a free copy as a contributor. Does any other contributor know anything about this ?

General Meconopsis Forum / Golden root mealybug
« on: June 17, 2017, 03:56:31 PM »
Just seen a post on the SRGC forum by Alan Elliott who apparently ran a Meconopsis Workshop at RBGE today. He was drawing attention to this as a potentially devastating pest, Has anyone had problems with this ?  How easy are they to spot ?  Any obvious early symptoms ?  Worrying and would like to know more.

General Meconopsis Forum / Gardener's World on-line Videos
« on: June 01, 2017, 01:01:52 PM »
Checking up on availability of the new Meconpsis for Gardeners book, I came across Monty Don's videos on sowing Meconopsis 'Lingholm' seeds and planting the plants he raised. Has anyone else seen them ?  I was shocked by what. to me. were serious inaccuracies. He insisted on sowing Meconopsis seed fresh which may be necessary for some species but certainly not for Lingholm which most of us sow in January/February and get good germination. Properly stored seeds will germinate fine in the second year and well beyond. 

As he apparently didn't go in for early pricking out and potting on his one year old seedlings and the plants he eventually planted after two years looked starved and were much smaller than one would expect - I would expect to have plants the size he was planting by June or July in the year of sowing.

Has anybody given him any advice or feedback ?  Because he is a 'celebrity' I imagine it isn't easy but if no-one else has done so, I will have a try.

Growing / Meconopsis baileyi ex Doshog La
« on: April 21, 2017, 06:45:53 PM »
Just inspected the seedlings in the nursery and noticed that the seedlings of the wild collected M. baileyi appear to have grown faster than seedlings from my own plants and to have rounder true leaves. Has anyone else noticed that this strain of M. baileyi is beginning to look a little different from existing forms

General Meconopsis Forum / Meconopsis Group numbering system
« on: April 15, 2017, 05:03:15 PM »
Does anyone know how to access the numbering system used by the group ?  Would like to read more about MG100 for a start.

Has anyone else grown integrifolia seed from Bjornar. I had seed collected in 2014 which germinated very rapidly. Some seed was kept back and sown again this year. Again it germinated rapidly. I also had fresh seed collected in 2015 which failed to germinate at the usual time but I hung on to the pot and do now have a couple of seedlings. The same seed sown this year at the same time as the 2014 seed has again failed to germinate. I am wondering now whether they are actually the same species.  Does anyone else  share my experience ?

Species / Meconopsis staintonii
« on: February 21, 2017, 08:48:05 AM »
I notice that the Plant List still regards this name as 'unresolved'. Has any work been done on the DNA ?  It seems that the white form grows much taller than other colour forms. This year I have sown four different colour forms, twofrom Cluny seed plus my own red form which was only about 90cm tall and seed from Ian Scott's albiflorum (very tall). Only the lemon yellow form has germinated so far. Might the different colour forms potentially be separable ?

Identification issues / Meconopsis 'Jim's Ex'
« on: January 19, 2017, 04:33:38 PM »
Offered by the SRGC seed exchange last year. Bizarrely a couple of seeds have just germinated from a sowing last January. Never had a blue meconopsis wait a year before.  Does anyone know any more about this one ?

Growing / High Alpine Species
« on: January 14, 2017, 12:02:13 PM »
I have a number of species just sown that I am going to struggle with growing if I ever get them to germinate, not just the balangensis which I have already posted. Does anyone out there have any experience of creating good conditions for those meconopsis species that live in scree above the tree line ?  Clearly can't match the conditions accurately but presumably alpine experts might have advice to offer.

Seeds and germination issues / Meconopsis exilis (or is it sulphurea)
« on: January 13, 2017, 05:18:36 PM »
Received my final batch of seeds from Bjornar Olsen ( today.  They include something he sold as Meconopsis sp. He says he intended to collect Meconopsis exilis but when he got home he realised it might actually be Meconopsis sulphurea. Whichever, I found three packets in my batch of seeds. My first impression is that the seeds are larger than what I have sown as M. integrifolia or pseudointegrifolia but under the hand lens they have  a similar shape to the seeds of M. integrifolia he sent and are only marginally larger. I have sown a batch today and have plenty left for next year so if anyone would like one of the spare packets I am happy to send them to a good home.

I have had excellent results with seeds from Have just germinated all his 2014 and 2015 seeds I had left and his are easily the best of the wild-colletected seeds for germination success. What a shame this is his final year.

Species / Meconopsis balangensis
« on: December 31, 2016, 04:42:11 PM »
For the second year, I have excellent germination of this species from seed obtained from Bjarne Olsen last year. Last year I lost the lot and would like to do better this year. Has anyone succeeded with this species ?  If so, advice please.

Seeds and germination issues / When to sow
« on: December 31, 2016, 04:38:50 PM »
Many tears ago there was extensive discussion about the optimum time to sow the big blue mecs such as baileyi and Lingholm and the consensus at the time favoured February. We have largely stuck with this although sowing a little earlier hasn't made any significant difference. In the January 2015 edition of 'The Rock Garden' Geoff Hill reported extensive trials on a number of other Meconopsis species which showed maximum germination success from sowings in October or November.

Last year I started to experiment with this approach with mixed success. Perhaps because I broke my own rules and moved the seed pots into the greenhouse for a while, overall germination was the poorest I ever had. Those seeds I did succeed with germinated only slightly better when sown on 24th October than on January 17th. M. napaulensis (hort) and M. paniculata from two different sources sown on October 24th all germinated on November 26th. M.staintonii alba did not germinate until May 19th, a few days after the seeds sown on January 17th.

This year I sowed a handful of species in November. So far only one species has germinated successfully - I spotted avery full germination of M. balangensis this morning from a sowing on November 25th. I have posted elsewhere a query about how to grow this species. The seed came from Bjarne Olsen (Trillium) last year and I got good and equally rapid germination from a sowing on February 7th so I am not sure what I was thinking about in chosing a November sowing this year. I have asked for advice elsewhere about how to grow this species on - I singularly failed last year.

It would be interesting to know when other forum readers find to be the optimum sowing time for various species.

Growing / Meconopsis simplicifolia subsp. grandiflora
« on: December 22, 2016, 02:27:29 PM »
Ian Scott has charged me with looking after this plant. I got the seed rather late so I wasn't able to sow until March 18th, two months later than my other meconopsis. Surprisingly, in a year when most of my Meconopsis Group seeds failed, I did get some germination (on May 4th) and now have four quite healthy plants which are settling back to a small rosette of leaves just now. (I kept back most of the seed so more will be sown in the next few weeks). The problem is, what now ?  My inclination is to overwinter in pots and then to plant up Peter Korn style in a fishbox full of sharp sand on my allotment (north-facing slope and 600 feet up). Has anyway experience of growing this species successfully or alternative advice ? My meconopsis bed in the Sheffield Botanic Garden is immediately next to an area into which huge amounts of grit have been incorporated so very free-draining. Is this a possible site ?

Hybrids / Meconopsis baileyi x latifolia
« on: December 15, 2016, 08:11:20 AM »
Does anyone know anything about the origin of the seeds offered under this naming on the SRGC seedlist last year ? I posted a query on the SRGC forum but received no response and an internet trawl only feeds me back to that forum post. I did raise plants and then forgot about them until I spotted them among the baileyis and Lingholms as something different. Slightly greyer foliage than ordinary baileyi but otherwise similar. One plant is now in my tiny back garden meconopsis plot and, for what it is worth, it has gone back more slowly than the type baileyi next to it. We also bought a 'blue meconopsis' hybrid from Elizabeth MacGregor last summer which is also in the same area and looks quite similar in leaf and in its response to frost. Too soon to equate them in any way otherwise and more will be revealed if they overwinter successfully and flower next Spring.

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