Would seeds from a hibiscus plant kept in a baggie from several years ago still grow?
Only one way to find out. Plant them and see. If the conditions were right it is always a possibility.
how to harvest oregano seeds and what do they look like
The seeds are very small, somewhat elliptical and brown or black. If you web search for your oregano type and look at images, you'll see. Wait until the blossoms are brown and dried up. Use a cup and shake the blossom in it, gently tapping the seedhead against the side of the cup.
helpful and informational answer
When collecting seeds, they need to be dry before storing. But if you soak your seeds before planting, you can plant right away.
https://www.gardeningknowhow.com/garden-how-to/propagation/seeds/soaking-seeds.htm
Unfortunately, there is no one answer to your question. Annual flowers and vegetable/soft fruit seeds can usually be planted immediately after harvest. There are some seeds that need special treatment before they will germinate. These are often seeds with hard seed coats or pits that may take two years to germinate without "scarification". Also, many perennials, except grasses, from cold weather regions have a built-in dormancy period to prevent germination in late autumn that would result in winter kill. These seeds require "stratification" in a cold, moist environment before sowing. If you sow seed before this dormancy sets in and can protect seedlings from winter weather, some may germinate. You would need to collect and sow the seed as soon as it matures. I suspect this inherent dormancy is stronger in some plants than others which leaves you with researching each type of plant and how to grow it from seed. That isn't a very satisfying answer! All seeds should be cleaned; remove as much of the pod, fluff or pulp as possible to decrease the risk of disease.
If I plant seeds from packets I bought at the end of summer last year, will flowers grow?
Absolutely, these should be viable after less than a year. It helps to store them in a cool place. Here's a helpful article:
https://www.gardeningknowhow.com/garden-how-to/propagation/seeds/planting-old-seeds.htm
Hi. I am completely new to gardening and I am learning as I go. I don't have any fancy equipment, but I do the best I can with what I have. I started my seeds indoors inside recycled bottles and seasoning containers. I started them around two weeks ago and they had been sitting in the window frame. Unfortunately, my family has made me move them outside of the house. The last frost date is not until around April 15th, but I don't have anywhere else to move them. Will moving them outdoors now impact them too much?
Your seedlings will be impacted if there is a frost. You will need to cover them or bring them back inside. Even the garage would do overnight. Also they need to be hardened off before leaving them out 24 hours a day. Here is how:
I am restoring open space and want to place 100 clay seed balls with local grass seeds. I have 5 different local species. How much powdered red clay should I purchase to make 100 balls?
It depends on the size of your seedballs and the ratio you use. Our article says 5 parts clay to 2 parts potting soil or humus and 1 to 2 parts seeds, but I've also seen 5 parts powdered clay to 3 parts compost and 1 part seeds. I have no idea how much a seedball weighs, but doing some sleuthing at ready to use seedballs online, I would guess about one pound would be more than enough.
I put extra bought seedling packs in a paper bag and put them in my freezer to save. It this ok?
Yes, if they are dried properly first. If you plan to use the seeds next year, it really isn't necessary to store seeds in the freezer or fridge. You can just store them at room temperature or in a cool, dry drawer. Freezer use is more for long-time storage.
Here is more:
https://www.gardeningknowhow.com/garden-how-to/propagation/seeds/does-freezing-kill-seeds.htm