thinning? Evidently I have not grasped the logic behind the process of sowing plants closely then thinning.
The idea will be to plant a few seeds at each spacing mark because there WILL be some loss. Planting only one seed per spacing mark may mean that there are empty spaces between your crops if there aren't a few there to replace one if it dies or gets eaten.
Thus, planting a few and thinning once they are mature seedlings (not just babies) can help reduce loss.
I try my best to be an organic gardener
You can make your own fungicide with baking soda and water. Cinnamon also has some fungicidal properties. Here is more:
https://www.gardeningknowhow.com/garden-how-to/info/homemade-fungicide.htm
https://www.gardeningknowhow.com/garden-how-to/info/using-cinnamon-on-plants.htm
i have followed the procedures I saw, but the seeds don't germinate. what could be wrong?
This will be a different process depending on the exact type of seed in question. There are many reasons why a seed will not germinate, but this can be very specific depending on the type of plant seed in question.
Many reasons will include over/underwatering, out of temperature range, unmet scarification/stratification requirements, or other unmet environmental needs.
Planting the “Sprouts” in potting soil: I have good “store-bought” potting soil … I move the mature sprouts from their sprouting site to small 2-3 oz. …(6 pack plastic trays) …. (Inside 78* house) It would seem that the new plants don't require much in the way of supplements in the beginning… Just simple dead planting medium… Correct? But then after they get real leaves … I move them to 8 oz. Styrofoam cups w/ holes. That’s mostly when I am wondering … should I supplement the potting mix with: 1) potash 2) epson salt 3) Mycorrhizal Inoculant 4) seaweed powder 5) Blood meal ??? I mean … don’t they need some Food etc? How do they grow those healthy plants (in the stores) that are a foot tall in a tiny tray? I know it’s probably in an ideal environment … but what do you think is the medium?
Here is some information on seed transplanting mixes and how to mix your own:
https://www.canr.msu.edu/news/potting_soils_and_seed_starting_mixes_for_your_garden
https://www.gardeningknowhow.com/garden-how-to/propagation/seeds/soilless-seed-mix-info.htm
I have a greenhouse and intend to start many seeds in Jan. or Feb. I wonder how to find out if some need light and some darkness or some need heat mats and others don't. Where could I get that info??
This is a complex subject that will be species specific. Generally, you will start with a search on the specific species in question, and work from there to know what it will require.
You can start with this article, and continue on with the search function at the top of the page:
https://www.gardeningknowhow.com/garden-how-to/propagation/seeds/seed-germination-requirements.htm
I have seeds but it seems like the wrong time of year to plant
Garlic and many greens can still be planted now through october. Here is a guide that will offer more detailed information:
https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-4/zone-4-seed-starting.htm
Sometimes when I cut open a tomato, orange, etc., the seeds are sprouting. Today, the apple I cut had sprouting seeds. Each of the fruits have been fresh; sometimes store bought, sometimes garden grown. Can you tell me what causes this? Can they be grown?
This article explains it. And yes, you can plant the sprouts, but you may not get an exact replica of the parent plant.
https://www.gardeningknowhow.com/garden-how-to/propagation/seeds/what-is-vivipary.htm