Volunteers could be self-seeded offspring of last year's plants, seeds from compost, or seeds scattered by birds and squirrels. Some plants, like raspberries or mint, can send runners underground, producing more volunteers. One important thing for new gardeners to understand, is that they can't keep all volunteer seedlings, as there's really no room in the garden. Some can be given away but many will end up in the compost.
|Tomato seedlings near a pistachio shell|
Volunteer tomatoes are the survivors, and usually grow more vigorous and bear more fruit than the more sought-after heirloom varieties. These seedlings will not emerge until late April or early May, but they will eventually catch up and surpass the indoor-started tomato seedlings. The fruit-type is a wild-card. In the past, most of ours have been cherry tomatoes, but last season we had a lot of larger-fruit varieties. My guess is that the open pollenated, fallen fruit from our own garden, will produce smaller, mongrel types, whereas the larger fruits that were grown in farms, and left in the compost bin, may produce true offspring. I also think that some of the heirlooms from the compost bin may grow at a similar rate as the mongrel varieties, just because the survivors have been self-selected form the hundreds of seeds; but, I'm not positive about this theory. Just think, do we plant 300 seedlings under the grow lights to chose one? Definitely not. As for hybrids, I'm not sure what their offspring will look like, and maybe the seeds are not even viable.
My advice is to keep a few and see how they do. If you didn't start seeds indoors, try only growing volunteers and skip buying plants. Also, give many away. In past Mays and Junes, I have given hundreds of volunteer tomato seedlings from our school gardens, to the kids, and then I have gotten lots of positive feedback the following Falls. People are generally not disappointed, as large yields are often more appreciated than fancy heirloom names.
Nearly all summer squash (i.e., zucchini, patty-pan, yellow squash) are varieties of the Cucurbita pepo species, all harvested in the unripe state, thus before the seeds are fully formed. Composted summer squash will not have viable seeds.
One more thing about squash seedlings... They may actually be another family member, like a melon. These will be identifiable from their first true leaves, which will be similar but with rounder edges. I'll post examples when some of mine grow.
Sunflowers will drop seeds that will sprout in their proximity the following April. Birds, squirrels and other animals will also scatter seeds. Or, they can be in the compost, as people compost their garden waste.
Similar to other volunteer plants, these will be easier to grow and more vigorous. The flowers are usually a lot smaller than the type we plant, but still very nice. I would keep a few and pot and give away others. Each spring, I start fancier varieties indoors, and if the transplants do not make it, I would let the volunteers grow. Usually we have some of each.
|More sun flowers|