Reasons gardeners grow plants from seed:
- They need a lot of plants at once
- They can’t afford to buy plants
- They’re purists
- They’re snobs
- They can’t help collecting seeds and finally decide to do something with them
- All or some of the above.
After 35 years of gardening, I have a lot of seeds — packets bought for ambitious projects years ago, tail-ends of vegetable and herb seeds from before my veggie patch became the ex-veggie patch, and assorted envelopes containing seeds gathered from my garden or from road- and trail-sides. Most of them are neatly filed away in a three boxes, one labelled “Perennials,” another “Annuals and Herbs,” and the third “Vegetables.”
It’s funny — there are plants I take pains to prevent from seeding (Lychnis coronaria), and others I cajole and pray over, hoping they will produce even a few seeds (Meconopsis, of course, but not M. cambrica — that one is in the deadhead a.s.a.p. category). Then there are those with rare or atypical colours — pink, cream-coloured, and tawny California poppies, for example. I can’t resist saving their seeds. Maybe this colour won’t ever appear again, I think; better get ’em while they’re here. So I end up with half a dozen envelopes — California poppies, 2010, 2011, 2013, etc.
Eventually, the obvious becomes inescapable — there’s no point in collecting seeds for their own sake. Each seed is a potential plant, but that potential will not be realized inside the seed packet. Soil, water, warmth, time, and luck are necessary before that tomato, delphinium, or poppy grows and blooms in the garden.
Unlike wine in the cellar, seeds do not improve with age. There’s no point in hoarding them. Yes, there’s that story about 3,000-year-old viable seeds from Egyptian tombs, but they’re the exception. Most seeds retain viability for only a few years — perhaps five years at most. Tomatoes appear to be an exception; I successfully grew plants from seeds almost 20 years old. Seeds of the Himalayan blue poppies (Meconopsis), on the other hand, must be sown the winter following harvest. A year later is too late.
I’ve grown hundreds, if not thousands of plants from seed. Back when I had a lot of bare earth to cover, I set up a plant factory in my basement — fluorescent lights, a heating cable, lots of suitable containers, and bags of sterile seed-starting soil mix. I made “paper pots” using a clever wooden device called a Potmaker to roll and fold newspaper into pot-like shapes two inches in diameter and about four inches tall. Packed together in a wooden or plastic flat, these “pots” lasted long enough to nurture annual seedlings until they were ready for life in the garden, at which point pot and all could be planted. Much cheaper than peat pots, and a “green” option as well.
Growing some plants from seed is dead easy; others are long-term projects often doomed to failure. Some seeds need exposure to freezing temperatures to induce germination. Others (Romneya coulteri, the California tree poppy, for example) germinate best after fires — not easy to do at home. Then there’s double dormancy, which may require two years before a sprout is seen. Many gardeners give up before that happens, or simply forget what’s supposed to happen in that pot and repurpose it. Working with challenging seeds requires dedication, labels, record-keeping, and space, as well as a good supply of patience.
The emergence of sprouts is always a thrill, no matter how long it takes, and especially if it takes a long time. A few years ago, I managed to sprout four seeds of Lilium columbianum, a native yellow lily. As I recall it, the sprouts emerged the second spring after planting. They went dormant for the summer, at which point I thought they had died, but last spring two tiny plants appeared. (I guess the other two decided to stay permanently dormant). One of the two survivors was cut down by slugs (probably a single slug, actually, because the plant was less than an inch tall). The other persisted for a couple more months, then vanished. Dead or dormant? Imagine what a thrill it was to see a lily-like sprout emerge last week, and a second one today! If I manage to foil the slugs, it’s possible I’ll actually have two plants taller than one inch by summertime, and who knows — maybe in a couple of years I’ll see at least one of them bloom. And if it produces seeds, I can do the whole process again — if I’m up to the effort.
As for all the old seeds I have stashed away in envelopes, pill bottles and other containers, the best thing would be to sort through them and get rid of any that are more than five years old. They don’t have a future, except as sad mementos of plants that have vanished, or that never progressed beyond the seed stage.
As a last-ditch effort in some cases, I could do germination tests — spread a sample of seeds between layers of dampened paper towels and see if anything happens. Unlike other unwanted items, disposal of old seeds is easy — mix them up and cast them to the winds. If any of them manage to sprout, I’ll consider it a gift from the garden gods.