Seed Starting Notes 2025
Containers
The 16 cell square flat with the green flexible bottom is okay, but seems to stunt the growth of the seedlings. The veronica sprouted well, but then stopped growing. The 6 cell packs that are a little larger are good. I even left some of my seedlings in them the whole time and they did well. Maybe next year, start in the small ones and use these for the potting up. (Not of deep rooted plants like tomatoes...)
The new super deep cells didn't really work for the broccoli, but seemed to work okay for the New Jersey Tea. Maybe only native seeds will work in these cells? Lupine did terrible in these and only one seedling made it. Also, these are difficult to handle. If you are going to do one whole flat of all the same, these would be great, but starting a variety of seeds that germinate at different rates doesn't really work with these.
Additional Rack in office
Buy an additional rack and some more lights for seed starting. Even though on paper I have enough space for all the plants I have planned, in reality, the seedlings are not ready to be planted up in time for the new ones to be started. Maybe I should move both racks in there? It would free up space in kitchen. I would have to do something to protect the carpet from the dirt and water that would fall down. And I would also be farther away from the sink and water. Also when bottom watering, there would be a lot of back and forth to the kitchen anyway.
Searching around on Greenhouse Megastore and found that the plastic tray that professionals use are not that expensive. It is very frustrating to keep tipping those cups when moving the plants. The downside is that the tray have holes int he bottom. I would have to find watering trays to go underneath.
March 30
I was able to pot up the scallions, the blue hyssop (probably shouldn't have, too small, not enough roots yet) and the pearl yarrow and bring downstairs. Lettuce also went down too.
Next year, buy more of the smaller Epic cells. Right now, the shelves are really full. The 10x20 trays that only hold 36 cells are really taking up a lot of room. The smaller 72 per 10 x 20 tray take up less space. When they are too big for those, then I can pot up and bring down stairs.
Not sure the deep root cells are worth it. They take up a lot of space. and you can't really break them up and move them around when some plants are ready, and others are still sprouting. I'm even thinking of repotting the broccoli into the Epic 4 Deep cells and getting rid of those altogether.
March 13
Sowed many seeds today.
The first sowing of Bells did not germinate well. only one cell germinated, but it is coming on well!
Lupine that were scarified and cold stratified in the fridge were germinating, so I have high hopes for them again this year.
March 1
Started the first crop of Bells of Ireland. They were in the freezer for 2 weeks, then soaked seeds for 5 days. Use the new Sure Root deep cells to accommodate tap root. Two seeds per cell. Some were a little gloopy with mold or something on them. We'll see how they do. I probably should have direct sword anyway from what I've been reading.
Use the vermiculite on top of all cells. It seems a little coarse. I was expecting it to be finer. We'll see how it work! Hopefully it prevents damping off.
February 23
The scallions came up almost perfectly, 17/18. Looking spindly, but I think that is how they are supposed to look?
As I am messing around with my numbers, trying to grow as many of the cool, interesting plants as I can with my space limitations, I just keep wondering why I am starting seeds for plants where the recommendation is direct sowing. Next year, focus on growing larger numbers of plants that need to be started from seed, and direct seed all the rest.
Next year direct sow: Bells of Ireland, Scallions, Lupine.
Fall sow: Purple Coneflower, Lupine (early spring or fall), Rudbeckia
This will enable you to grow 60 more seedlings!
Vermiculite- bought a bag at Gade Farms after one of the classes. Will use it this year for seed starting. Let's see if it prevents damping off.
January 11
And so it begins! I decided to re-do the seed starting calendar acknowledging the new zone, so I moved things back two weeks. Let's see if I have a basement full of too large plants this spring!
Gave the New Jersey tea the boiling water treatment. As I am doing this, I notice that the seed packet says do boiling water OR 60 days cold stratification. The webpage says nothing of that. I hate it when there are not clear instructions.
Experiment:
- 12 seeds with the boiling water followed by cold stratification- Jan. 11
- 12 seeds with the cold stratification- Jan. 11
- 12 seeds just do the boiling water treatment- March 13
- Sow multiple seeds in cells, mark well and see which ones germinate best
Also, the packet does not really say the timing of all of this, so maybe I am starting way too early and I am going to have to re-pot into deep pots to make it to the spring.