Nannorhops ritchiana minimum summer temperatures to grow

[dilbert]

Hi,

I bought two Nannorhops seedlings, each one with three leaves of about 5 to 10 inches long. I planted them around Christmas in winter and as it hasn't been much cold or wet and they got occasional protection against cold rain, they still look the same as in December.

We have got an exceptional cold summer this year that slowed down even the growth of our Dicksonia antarctica tree fern. It grew only significantly in April being with 75°F still the warmest month this year! I know now that Nannorhops won't get any further without special help.

Both plants got already their mini-greenhouse since end of June but without sun those are pretty much useless and also with 70°F outside and an occasional sunny day they get only to 90°F inside. During night, temperatures fall again to 50°F or even 45°F, sometimes.

So, they still don't think to grow anyhow.

I was wondering if someone knows the minimum temperature for them to grow. I know getting some heating and adjust it to 100°F during day and 80°F at night will probably do the job, but it's about saving energy.

I also thought to dig them out and keep them indoors. But that would first require relative large pots and then we don't heat much our house in summer when it gets already to at least 70°F. But that seems to be early spring for the Nannorhops, again, and they won't grow neither, presumably.

[Alchris]

I don't know the minimum temperature for Nannorrhops ritchiana to increase in size.

Did you receive the palms bare root? Many palms will take up to a year to recover from the stress of having their root systems tampered with when they are transplanted.

Allen

[dilbert]

Did you receive the palms bare root?

Not really, but sort of ...

They came within squared little pots but the soil was dry and scattered around. About the half of the soil kept still in the pots and around the roots.

As the Palm Centre in London (where I got them from by mail) suggested to plant them with pots together. I simply cut off the bottom of the pots and made cuts on one side to able to remove the pot later at some time without greater hassle, put the remaining soil back into the pots, watered the pots about an hour or so, and planted the Nannorhops together with their pots.

A far more greater Sabal (about 3 feet high) came within the same parcel, only with a really spacious pot and really humid soil, so everything was fine. I planted it also with the pot following the same procedure as above.

At the Sabal I could observe a very small growth at least, that is the leaves that form the spearhead opened a few millimetres wider and the spearhead grew about an inch or so.

The suggestion to plant the palms with their pot came from the Palm Centre. I think, the author of various books on palms Martin Gibbons owns that Palm Centre, so I was confident to adapt this idea.

I only know from the Cycas ferns that those "slow growers" turn rather wild when given bright light, plenty of water, and heat over 100°F.