Hi, just curious at what temps people are generally growing these? I think I need to maybe evacuate mine to a cooler location.

Thanks!

I let mine get in the mid to low 50's in the winter (night lows) in the last two winters. I have gone less than that in previous years. This is the first winter I supplemented lighting over the plants, and my armenicaum is budding. I have spiked micranthum to at odd times of years, but these have blasted.

Summer highs in 80's and 90's

Thanks Rick, what about daytime temps? That's where I think I may really have them in a spot warmer than they like.

2nd armeniacum this season is getting ready to bloom soon. Low to mid 60's night, 70's day most of the winter. Sometimes higher in the day. I think it's mostly dependent on the night temp. delanatii isn't as particular...unless it's mine!

I'll tag onto this thread... Are people successful at "Parvi temps" with the villosum/insigne "family"?

Summer highs in 80's and 90's

Thanks! Rick, we must have been posting at the same time.

I guess I'm okay then, getting into the 80's in there occasionally.

Heather
Are you concerned about poor growth or lack of flowering? Antec has a cool tech sheet on "use of environmental data" for culturing of armeniacum, and I think the culture sheets for the parvis are real good on the Orchids Limited site. I think a key to parvi flowering is to have lots of light (catleya levels) when they're cooled in the winter, and shaded in the hot summer months. Most of them also like lots of calcium. Most of mine are in slat type baskets, CHC based mixes with lots of oyster shell. I also have limestone chunks in the bottom of the baskets.

Each Parvi is slightly different, but especially armeniacum and malipoense experience quite cold temps in the wild. Average minimum temps recorded near armeniacum growing areas in the winter are in the 30's and 40's, so a cool down is definately a good idea. Source: Charles and Margaret Baker's culture sheets.

Neither really - honestly I have not done much Parvi research, I only have micranthum, delenatii, armeniacum and malipoense. The former three are small and not mature. I need to do the research to learn more about them, that's all. I always have heard though that they like cooler temps in the winter time and was unsure if that was daytime as well as night, so that was very helpful information. I grow mine in very bright light (actually up with my few cattleyas and other sun lovers) at this time of year, in the summer they'll be in my regular growing area and a bit more shaded. However, the room they are in tends to be the warmest in my house. So, next winter I may do things differently and they will be larger then and hopefully close to flowering size.

I also like the rainfall/temp charts in Averyanov's book on vietnamese slippers. It is amazing how cold allot of stuff in North Vietnam and southern China (at higher elevations) gets in the winter. There is an article on emersonii and hangianum in March AOS magazine by Averyanov. Same format in the article as in his book. I have heard from some succesful parvi growers that they have not had to get the temps as low as they go in the wild.

I gow all my parvis cool except for delanatii...armeniacum stays the coldest...outdoors in early-mid April, indoors late Oct-mid Nov, depending on weather conditions...micranthum, malipoense and emersonii along the same lines, but indoors sooner and outdoors later. Interestingly enough, the one time I bloomed armeniacum it was an exceptionally warm fall, and no other paphs budded at all.....Take care, Eric

I’ve been going about this very simplistically. I give them as much light as I can in the fall and winter, less in the spring and summer. I expose them to cold snaps in the winter. Always with the air circulation. High nitrogen while they’re growing and bloom booster when they get close to completing a growth. This is working with the primary parvis. The species are almost BS. Will let you know when my favorites spike (that’d be malipoense)!

Robin