They take time to grow and should be started indoors well before last frost. The Coleus seeds are small and growing them 1 seed at a time doesn't make sense to me. It is true and you can see by the pictures that 1 seed per cell or fewer seeds per cell mean bigger plants initially. However, they are being grown to fill space my garden and I just don't have the room to grow 100 single Coleus plants indoors. I wish I did!
I over seed cells, divide into cups and divide again once they are hardened off to the outdoors and ready to be transplant into my containers or ground. That means 1 cell of plants get divided. That leaves me 2 cups. The 2 cups will get divided or even quaded (is that a word?). I can end up with 4 to 8 plant bunches for my garden from a single seed starting cell. This is how I manage minimal room in my house and great desire for plants. It works for me.
|Coleus Seeds: Gary Pilarchik|
I planted my seeds the first week of January or close to that and now about 7 weeks later, they go into cups. I use Miracle Grow starting mix as part of my mix or fertilized starting mix. Planting this many seeds in a cell sucks out nutrients. The cells with bigger Coleus seedlings had fewer seeds.
|Coleus Seedlings for Transplanting: Gary Pilarchik|
|Coleus Plugs Torn Down the Middle: Gary Pilarchik|
|Coleus Transplanted into Cups: Gary Pilarchik|