Cactus seeds not growing

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I planted the following cactus seeds in a small covered tray:

IMG_7125.jpeg
IMG_7123.jpeg
IMG_7124.jpeg


Using the following mix:

cactus_mix.jpg


The tray has been on the window for about 6 weeks now and there is no sign of any growth.
I Planted at start of December, I am out of the house a lot so the heating is off and the house is fairly cold as I live in UK.
The soil is moist.

Is it time to write off these seeds? Any tips as to why they have not grown?
 

Chuck

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Soil temperature is very important when sprouting any seeds. You need a heat mat and possibly a grow light. I would also press the seeds slightly into the soi but not bury them.
 

Chuck

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Is it too late to add heat map and light at this stage?
It is probably but not definitely too late. I would plant more seeds alongside those already planted and that, along with a heat mat and light, you should be sucessful.
 

oneeye

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For optimal cactus seed germination, the best humidity level is considered to be very high, close to 100%. You need to use a plastic dome or cover the pot to maintain a humid environment while the seeds sprout. The best temperatures are between 70f and 90f or 21c to 32c to germanate seed. Without a dome, you will have problems. Don't quit or give up friend, just need to work with the right tools for easy success.

 

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