Red Lightning x Grande

Slippertalk Orchid Forum

Help Support Slippertalk Orchid Forum:

orchid527

Well-Known Member
Joined
May 29, 2011
Messages
982
Reaction score
195
Location
southern Indiana
Well, I used to grow everything in Promix, but I found out that moss works best for the smallest plants, Orchiata seems to work best for plants in 2 in to 6 inch, but after that things become unpredictable. Wet bark, even Orchiata, doesn't last very long and sometimes when I repot, it is a big fungal mess. The roots are still OK, but it looks disgusting. Also, I often see the roots lifting out of the pot because they can't push through the bark. That said, I try to use bark as long as possible. Sometimes it is seedling bark and sometimes it is the next size up, but for many large plants it just doesn't work very well. This is when I switch to Promix HP with a little extra perlite. My very largest phrags are all in Promix. I water every 2 or 3 days and wash out frequently to remove accumulated salts. My greenhouse is a little on the bright and dry side, and sometimes is a little too hot. I do not have any of my phrags standing in water, except when I am away for more than a week or so. This seems to work for everything I have including kovachii, and I have received a CCE on one of my big phrags growing in Promix. However, I must admit that I have less success with the long petal species, and I have a strong feeling that I could be doing better with everything, if I could just find the right combination. I am going to be running some experiments with large plants in Promix vs Bark vs Grodan + Hydroton for about a year. I will probably switch all of the big ones over to the one that works best. Mike
 
Last edited:

orchid527

Well-Known Member
Joined
May 29, 2011
Messages
982
Reaction score
195
Location
southern Indiana
How hot does your GH get? Is the PK in the GH?
I have seen it reach 100 degrees when we had a warm summer several years ago. If it looks like I will have several days above 90 degrees, I bring the largest Pk inside with the A/C, because I have too many years invested in that plant and the flower is nice. I do leave the smaller ones in the greenhouse, but they are in a shadier location near the floor. My guess is that it is a few degrees cooler in that location. I do see stress in most of the phrags in the summer. It shows in the older leaves, but the new growths are OK. By the time they start to mature, summer is gone and cooler weather has returned. The greenhouse is not optimized for phrags. It's not really optimized for anything, but it is the best I can do for the money and effort I am willing to spend. Mike
 
Last edited:

Latest posts

Top