Because the jar is a closed environment in a controlled temperature system
BrilliantRain5670
My guess depending upon your location is night time temperature. Did you have the jar outside or inside?
candycookiecake
I’m pretty sure this is why some people recommend pre-germinating grass seed before scattering it on the lawn.
cerebralvision
The moral of the story here is that you have to put your entire outside lawn in a jar.
MarkChamorro
A ton of variables to assume without further information.
Indoor/outdoor? Temperature at night? Mason jar holds more moisture in a “closed” environment? Soil differences? Amount of light? Animals eating seed?
Way too much to infer based on an image and no additional info.
nilesandstuff
Moisture like others have been saying, but also temperature…
The interesting thing about temperature in regards to seed germination is that grass seed germination is more quickly/reliably triggered by **fluctuations** in temperature. There’s essentially a secret code for grasses when it comes to those temperature fluctuations… Some seeds won’t germinate when that pattern of fluctuating temps isn’t met. You would get SOME germination if the pattern is wrong, but not all.
The thing about germinating in the jar indoors, especially if you put it near a window, is you’d actually likely be subjecting the seed to those exact fluctuations… Not quite as severe as outdoor, but more within the range that grass seed likes.
Generally speaking, cool season grass seed likes fluctuations in the 55F-75F range. (These are air temps, not as much soil temps)
P.s. you also seeded the jar crazy heavily, which certainly makes it look especially vigorous… For now.
7 Comments
What’s the average temp outside vs inside?
Because the jar is a closed environment in a controlled temperature system
My guess depending upon your location is night time temperature. Did you have the jar outside or inside?
I’m pretty sure this is why some people recommend pre-germinating grass seed before scattering it on the lawn.
The moral of the story here is that you have to put your entire outside lawn in a jar.
A ton of variables to assume without further information.
Indoor/outdoor?
Temperature at night?
Mason jar holds more moisture in a “closed” environment?
Soil differences?
Amount of light?
Animals eating seed?
Way too much to infer based on an image and no additional info.
Moisture like others have been saying, but also temperature…
The interesting thing about temperature in regards to seed germination is that grass seed germination is more quickly/reliably triggered by **fluctuations** in temperature. There’s essentially a secret code for grasses when it comes to those temperature fluctuations… Some seeds won’t germinate when that pattern of fluctuating temps isn’t met. You would get SOME germination if the pattern is wrong, but not all.
The thing about germinating in the jar indoors, especially if you put it near a window, is you’d actually likely be subjecting the seed to those exact fluctuations… Not quite as severe as outdoor, but more within the range that grass seed likes.
Generally speaking, cool season grass seed likes fluctuations in the 55F-75F range. (These are air temps, not as much soil temps)
P.s. you also seeded the jar crazy heavily, which certainly makes it look especially vigorous… For now.