Humidity domes

Lloyd Gordon

Parasitic Plant Aficionado
Staff member
You know the black plastic 1020 seed propagation trays with the 7" humidity domes (Mondi) that a lot of us use. I find them convenient. However for some of my plants I'd like a higher humidity dome. I couldn't find anything like that around. I could MacGyver something that would be sort of shabby. Does anybody have any ideas? I don't really want to go to a more substantial terrarium route.
 

Lloyd Gordon

Parasitic Plant Aficionado
Staff member
Clear storage containers, very clever. But are they really clear like the humidity domes or are they "semi-clear"? All the ones I've seen are not really clear so would cut the light down. Has anybody seen any that are really clear and maybe 10-12" high or so? Links would be nice.
 

Carson Hardy

Carnivorous Plant Addict
We need some of them 3D printer guys! haha

So... I too have had this problem cross my mind, and my greatest idea is... some form of riser. In my perfect world, this riser does two things.
1. it adds 'x' to the height of our trays
2. it removes the dripping effect of condensing water

But, for me, I also have two hurdles:
1. no 3D printer
2. I don't believe in myself to draw/design it :(
PXL_20210408_021240631.jpg
 

Lloyd Gordon

Parasitic Plant Aficionado
Staff member
Here's my MacGyver. Take a 1020, cut a rectangle out. Mount the cut out 1020 in an intact 1020. You could support it by spacers or glue/screw it into the bottom, intact one to support the dome up higher. The most you could rise it would be by the height of a 1020 which is 2.5". I might end up doing this.
Riser.jpg
 

WillyCKH

CPSC Moderator
Staff member
Carson's idea is nice but I think it will be too difficult to manufacture. Lloyd's idea is a little simpler but keep in mind most 3D printers can't print such a big piece, and even if it can be done, it won't be economical...
 

WillyCKH

CPSC Moderator
Staff member
The reason most humidity domes are 6"-7" tall, is that they are made with vacuum forming technique. There's a height limitation to this method since each plastic sheet can only stretch so much.
The "clear" containers are translucent because they are commonly made (likely by injection molding) with PP (Polypropylene) or PU (Polyurethane), which are durable and more color-stable.
 
I like using tubs too. I have a “KIS OMNI BOX” with the dimensions 23.2” x 15.4” x 11.9” that’s a pretty natural upgrade from those lovely 7” grow domes.

Out of curiosity, I just used my light meter to compare grow light readings with and without the lid on. It only went from around 13 000 lux to 10 000 lux - not that bad of a drop!
 
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