By Roachie
United Kingdom 
Emptying my compost heap I found tiny granular cerise, orange and yellow grains throughout from top to bottom. They are very hard but seem to be white inside when crushed. Photos attached.
13 Oct, 2015
Answers
could also be fungal nodules but odd none the less.
14 Oct, 2015
Seaburngirl, could it be Frankia alni? though I've only ever known about it in association with tree roots...
14 Oct, 2015
yes it could be but we don't know what was put in the compost heap originally. I only know of it as a symbiont in trees/shrubs too but perhaps it hasn't read the books. !
15 Oct, 2015
Previous question
« Hya has anybody used The Seeds from Suttons Called grow your own Manure, is it...
Next question
Seeds from dead-heads or fruit you have put in the compost, possibly. They can be quite resistant to decomposition.
Can you remember what you put in?
13 Oct, 2015