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Page 1 of 4 1 234
Showing results 1 to 25 of 83
Search took 0.02 seconds. Search: Posts Made By: markr
Forum: Growing Under Lights 05-25-2009, 06:13 PM
Replies: 5
Views: 5,380
Posted By markr
:)

:)
Forum: Beginner Discussion 05-22-2009, 12:20 PM
Replies: 3
Views: 3,150
Posted By markr
I actually think sphagnum moss is a good fit for...

I actually think sphagnum moss is a good fit for a miniature - since you are presumably using a small pot, it will dry down quite quickly. There are several benefits to using sphagnum, despite the...
Forum: Advanced Discussion 05-20-2009, 08:57 PM
Replies: 3
Views: 1,205
Posted By markr
Yes, you can transmit viruses and other things...

Yes, you can transmit viruses and other things that way. You should soak the plants individually in new water and sterilize your tools before and after you have cut roots.
Forum: Advanced Discussion 05-20-2009, 03:17 PM
Replies: 7
Views: 6,438
Posted By markr
It smells like damp, rich earth which essentially...

It smells like damp, rich earth which essentially is what it is.

This stuff was all the rage at an orchid show I attended about a year ago so I looked into it a bit. The consensus from critical...
Forum: Scientific Matters 05-20-2009, 02:11 PM
Replies: 26
Views: 25,247
Posted By markr
Terrestrial orchids are C3 photosynthesizers....

Terrestrial orchids are C3 photosynthesizers. Epiphytic orchids are divided in how they carry out carbon assimilation: thin leaved epiphytes perform C3, though there is some evidence for C4 too;...
Forum: Beginner Discussion 10-08-2008, 06:50 PM
Replies: 4
Views: 923
Posted By markr
Internet Orchid Species Photo Encyclopedia...

Internet Orchid Species Photo Encyclopedia (http://www.orchidspecies.com/) will give you a basic idea of what season many species are supposed to bloom - however, I have several species that don't...
Forum: Beginner Discussion 10-08-2008, 04:49 PM
Replies: 5
Views: 3,662
Posted By markr
Michel, Dyna-Gro Grow 7-9-5 is a good...

Michel,

Dyna-Gro Grow 7-9-5 is a good complete fertilizer for orchids - mostly urea-free nitrogen source, contains all trace elements, and it has calcium/magnesium if you have particularly soft...
Forum: Advanced Discussion 10-03-2008, 02:15 AM
Replies: 17
Views: 7,064
Posted By markr
I mix my fertilizer to approximately 150ppm N...

I mix my fertilizer to approximately 150ppm N with almost every watering, hardly a weak concentration, and I never apply pure water first. Occasionally (every 5th watering or so) I flush the pots (no...
Forum: Beginner Discussion 10-03-2008, 01:59 AM
Replies: 5
Views: 1,106
Posted By markr
There is a lot of variety in both of those groups...

There is a lot of variety in both of those groups (Phalaenopsis and Cattleya) and the various species come from a range of habitats - Catts especially range from sea level to cool high elevations -...
Forum: Beginner Discussion 10-02-2008, 03:35 PM
Replies: 25
Views: 5,664
Posted By markr
Posts 6, 9, and 12 offer essentially the same...

Posts 6, 9, and 12 offer essentially the same advice as yours.
Forum: Beginner Discussion 10-02-2008, 01:22 PM
Replies: 25
Views: 5,664
Posted By markr
I don't grow any actual Vandas, but I'd guess...

I don't grow any actual Vandas, but I'd guess that the first thing to address is whether or not yours are getting enough light - it's probably the biggest reason that orchids fail to bloom, and most...
Forum: Beginner Discussion 10-02-2008, 01:11 PM
Replies: 25
Views: 5,664
Posted By markr
For what it's worth, I use MSU type fertilizer...

For what it's worth, I use MSU type fertilizer (13-3-15) and sometimes Dynagrow (7-9-5) mixed for 150pp N throughout the year on all my orchids (mostly Angraecoids, Phals, Masdevallias, Restrepias,...
Forum: Scientific Matters 09-18-2008, 01:56 PM
Replies: 0
Views: 2,722
Posted By markr
Article: leafless orchid and carbon assimilation

Just thought I'd post a link to an interesting (though fairly technical) article on carbon assimilation by Chiloschista usneoides, a leafless orchid species.

Photosynthetic Carbon Assimilation in...
Forum: Beginner Discussion 09-16-2008, 12:15 PM
Replies: 12
Views: 6,814
Posted By markr
What you've described sounds like black sooty...

What you've described sounds like black sooty mold - sort of a black powdery substance on the bottom and edges of leaves? It grows on honey dew secretions from the leaves and in itself isn't very...
Forum: Advanced Discussion 09-05-2008, 05:55 PM
Replies: 2
Views: 1,622
Posted By markr
I use complete fertilizers, either 7-9-5 Dyna Gro...

I use complete fertilizers, either 7-9-5 Dyna Gro or 13-3-15 MSU-type, mixed to about 150ppm N on all my orchids. The only difference in procedure between different orchid types is the frequency with...
Forum: Advanced Discussion 12-18-2007, 01:04 PM
Replies: 15
Views: 2,990
Posted By markr
I used to find that hand misting indoor...

I used to find that hand misting indoor (windowsill) plants several times a day will improve the health of exposed roots but doesn't otherwise increase humidity around the plant much for longer than...
Forum: Beginner Discussion 11-15-2007, 05:38 PM
Replies: 17
Views: 2,656
Posted By markr
FinnBar, I grow several Aerangis species in...

FinnBar, I grow several Aerangis species in conditions similar to yours (indoor terariums in northern Canada, heavily insulated and heated home, opening windows in the middle of winter is not...
Forum: Beginner Discussion 10-28-2007, 02:19 AM
Replies: 9
Views: 1,195
Posted By markr
I'm almost certain that the problem is humidity,...

I'm almost certain that the problem is humidity, and you seem to have guessed this too. Exposed roots never do well (for me) unless humidity stays above 60% or so.
Forum: Beginner Discussion 10-23-2007, 04:17 PM
Replies: 9
Views: 1,393
Posted By markr
For me, warmth is not a problem - I have trouble...

For me, warmth is not a problem - I have trouble keeping my orchidariums cool enough! I wish I could get them down to 15C / 60F during winter nights but it rarely happens - I've only used passive...
Forum: Semi-Hydroponic Culture 10-18-2007, 06:39 PM
Replies: 15
Views: 10,213
Posted By markr
SRF, what you have described seems to be another...

SRF, what you have described seems to be another variant on passive hydroponics ('semi-hydro' as it's known around here, I'm more familiar with the term 'hydroculture').
"True" hydroponics, as...
Forum: Beginner Discussion 10-04-2007, 05:09 PM
Replies: 9
Views: 1,719
Posted By markr
Plants require a dark period in which to focus on...

Plants require a dark period in which to focus on cellular respiration rather than photsynthesis. A dark period is doubly inportant for orchids however, as most orchids are CAM plants, which means...
Forum: Vanda Alliance - Angraecum/Aerangis 09-28-2007, 09:38 PM
Replies: 10
Views: 9,580
Posted By markr
Yes, it has a scent at night - quite nice. ...

Yes, it has a scent at night - quite nice.

Looks like we share similar orchid interests - I also grow some Chiloschistas, though not lunifera.
Forum: Vanda Alliance - Angraecum/Aerangis 09-28-2007, 01:59 PM
Replies: 10
Views: 9,580
Posted By markr
Good luck with that Aerangis distincta, a real...

Good luck with that Aerangis distincta, a real gem of the genus. In full bloom with many flowers they're a miniature show stopper. Mine bloom consistently in early spring after a slightly drier,...
Forum: Beginner Discussion 09-26-2007, 05:57 PM
Replies: 39
Views: 4,024
Posted By markr
Among the most useful things for me when I was...

Among the most useful things for me when I was new to orchids were transparent plastic pots. It is very easy to see if your plants need watering or not and what condition the roots are in. After a...
Forum: Beginner Discussion 09-06-2007, 06:12 PM
Replies: 34
Views: 18,038
Posted By markr
Hi, I think the recommendation of 125 ppm N...

Hi,

I think the recommendation of 125 ppm N is a compromise - I'm perhaps putting words in Ray's mouth (fingers?) but that's how I understood his recommendation. When one has many different plants...
Showing results 1 to 25 of 83
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