They are used for hydroponics and as part of some orchid mixes and also to make light weight concrete and as a soil ammendment to lighten soil. If you should need further help on this question please reply to this post. The orange fungus growing in your mulch is a species of slime mold known scientifically as p hysarum polycephalum. If the spheres are more white or colorless balls that you can pop then they are most likely snail eggs. My assumption is that you are seeing time release fertilizer that was pre mixed into your soil.

This is a perennial question raised on more gardening sites than almost any other question. These slime molds are single cell organisms which feed on the bacteria produced by decomposing plant material aiding the natural decomposition process. They range from perfect smooth teracotta balls to lumpy rough brown things depending on the brand. Fungus gnats can be a problem with any potting mix if you over water and keep the soil overly wet. Your bag of potting soil should mention it.

Now to really confuse folks the slow release stuff i have been adding to compost to day has balls of almost every colour in the rainbow. He assured me that these yellow orange liquid filled b b balls that burst when squeezed are indeed osmocote fertilizer prills that absorb moisture which allows the liquid fertilizer inside to pass out of the prill and into the soil. Or use the bt prep found in the mosquito dunks. Old perlite can become discolored. Quit the excessive watering and they die off all on their own.

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However there is an orange mold like substance growing on the top of the soil and i can see a few tiny white bugs crawling stack exchange network stack exchange network consists of 176 q a communities including stack overflow the largest most trusted online community for developers to learn share their knowledge and build their careers. They could have been put in the bottom of pots to help drainage. Slime molds appear when the air is warm and wet. Rash you re right about vermiculite but wrong about perlite it is also chunky and irregular only white. As for the round balls they look like slow release fertilizer.

Osamocote does have a liquid centre when in damp soil. I have found small yellowish balls in the soil around what appears to be a dying clematis is it the result of a pest. I have a bag for rooting cuttings. It is not common but sometimes small plastic beads are added to specialty soil mixes. Perlite is a common soil additive found in most potting soil.

Vermiculate is chunky and irregular not spherical blobs. Since perlite is normally little white balls about 1 8 inch in diameter old ones that have turned yellow will look like yellow balls. Vermiculate is chunky and irregular not spherical blobs. Osamocote does have a liquid centre when in damp soil. However there is an orange mold like substance growing on the top of the soil and i can see a few tiny white bugs crawling stack exchange network stack exchange network consists of 176 q a communities including stack overflow the largest most trusted online community for developers to learn share their knowledge and build their careers.

Since perlite is normally little white balls about 1 8 inch in diameter old ones that have turned yellow will look like yellow balls. Now to really confuse folks the slow release stuff i have been adding to compost to day has balls of almost every colour in the rainbow. This is a perennial question raised on more gardening sites than almost any other question. They are used for hydroponics and as part of some orchid mixes and also to make light weight concrete and as a soil ammendment to lighten soil.