Question by : Why do some plants need stratification, and others need heat to germinate. Is there?
any way to tell which will need a cold period to germinate. Can I stratify all!! my seeds in damp baggies in the fridge , since I live in a zone 5. Is it ok to put my herb seeds on heat and fruit seeds and spring flowering plant seeds in the fridge.
Answer by Cat
You don’t need to stratify most common garden seeds. If you stratify ALL your seeds, you could KILL some of them.
Every seed packet will contain information on stratification (if necessary) for that particular seed. It will also contain transplant information, germination information, pH preferences, moisture preferences, and anything else you need to get that seed to grow. There is no way to tell which will need a cold period without checking each individual seed packet. Most seeds don’t require any stratification at all and will be quite happy if you just plant them in soil and give them water and food.
Off-hand, basil, borage, all mints, thyme, catnip, marjoram, pennyroyal, cumin, parsley, epazote, chives (and all members of the onion family), dill, lavender, fennel, lemon balm, chia, tarragon, and oregano do not require ANY stratification at all. Many of them will simply germinate if you put them in damp soil in your refrigerator, so you would be wasting your time by doing so. Better to check your seed packets to figure out when you need to plant them indoors and then just stick them in seed starter mix under a grow light.
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