I noticed that there were mysterious sprouts growing in some of the containers on my balcony garden. Unsure as to what they were, I posted a picture on Between the Posts and asked. No one could identify them.
They started off showing up sporadically in a few containers, but they’ve since started to grow more densely. Then I realized it.
Before I left for Costa Rica, I dumped out all of the soil (and seeds) that were in the coconut shell planters. There were about 20 in total and only three or four had sprouted. The soil was put into a bag to be reused when I got back.
After the trip, I mixed the soil with some compost, totally forgetting the seeds were in there, and filled up new containers.
They took so long to sprout because they were well mixed into the soil. So the mystery sprouts that are growing in all of the containers are some kind of lettuce that used to be planted in the coconut shells.
No clue how I totally overlooked that. What this shows is that these things want to grow and will under many conditions. Gotta love nature.