Topic: Preventing mould on compost

[GodfreyRob]

Each year I have tried different organic potting composts but I end up with a lot of green algae/mould on the surface of the pots/seed trays in the greenhouse (sometimes just a few days after sowing) and some seedlings get choked and rot away.

I am quite careful with the watering but it does not seem to be down to this. I want to continue using organic compost if possible. Does anyone have any ideas about how I can prevent this mould developing?

[windygale]

Hi Godfreyrob, place some sharp sand into your compost mix, and place sharp sand or vermiculite on the top of your compost after you sow your seeds, this acts as a mulch and helps with dranage.

[shaun01]

to much water and stale air  i use kids play sand as a mix and top coate  and open the window a bit this should sort it for you  ;)

[manicscousers]

we only water from the bottom and keep most things on the dry side  :)

[Bean_Queen]

If you're getting green algae, then you're over-watering, and possibly not enough light.  It's the same stuff you get in ponds and on shady patios.

Always water your pots from the bottom, by standing them in a tray of water.  The plant will take up just what it needs.