Published by Brian Wagner on 11/8/25 in “Growing Flowers from Seed.”
Geranium maculatum (commonly called wild geranium) is a tough perennial for almost any garden setting. Native to hardwood deciduous forests of eastern United States and southern Canada, it is hardy to Zone 3, and will flower even in the shade. Be warned, however: it can fill your garden over time.
If you haven’t heard this before, the word ‘geranium’ used to also refer to a certain tropical plant from Africa (Pelargonium spp.) – and sometimes people still call these ‘geraniums’. The name Geranium, however, is probably best reserved for species in the Geranium genus, including Geranium maculatum.
Wild Geranium is native to the deciduous woodlands – where it thrives under the forest canopy. This means it will tolerate (and probably prefer) a hefty amount of shade, and putting up its pink flowers in spring through early summer.
Be warned, however: when the seed heads form, they transform into ballistic missiles – flinging their seeds far and wide. If you have time to kill this summer, watch your Wild Geraniums catapult their seeds into your neighbor’s yard (and down the street). But the warning isn’t too serious: they’re very easy to weed out of the garden if you don’t want the extra babies. Grow them once and you’ll never have to buy them again.
Wild Geraniums, like all ‘hardy geraniums’, can be planted just about anywhere – they’ll take full sun if you want, but they’ll prefer nutritious soil if they can get it. They will tolerate some drought, but as long as they get the nutrition and moisture during the spring, they’ll survive just about anywhere. If you have an awkward spot in the garden and aren’t sure what to put there, plant a geranium.
Growing from Seed
Most Geraniums are suspected as having a combinational dormancy, notably a combination of physical dormancy and a non-deep physiological dormancy. Its physical dormancy prevents it from imbibing water but it more so acts like a straight jacket preventing the embryo from pushing through. The non-deep physiological dormancy means that the embryo must experience winter in order to strengthen its ‘push power’ – i.e., it has to break through the straight jacket. Without winter, the embryo is too weak to overcome it.
In nature, the seeds will naturally germinate over time, because both winter and the elements will wear down the seed coat. This is why seeds often form a persistent seed bank in the soil, germinating over many years (and quite sporadically) after they hit the ground.
To propagate from seed, it will help to warm stratify the seeds first – and then cold stratify them. The reason is that the warm stratification phase helps break down the seed coat – simply being wet for a few months will break down a seed coat over time. To do this, it’s always best to sanitize the seeds first with bleach, which helps prevent fungus growing during the warm stratification period. To do this, mix 1 parts bleach with 9 parts water, and soak the seeds in this solution for 15 minutes. Rinse after with cold water. Then wrap the seeds in a moist paper towel – and place on a window sill for 3 months. They should be exposed to ambient light, but not direct light. Do not keep in darkness (which may push them into skotodormancy).
After the warm stratification period, you should transfer the seeds into the fridge for cold stratification. Not the freezer. Make sure they’re in a thin ziplock bag that is open a bit (to let in oxygen); thin bags breathe oxygen, but thick plastic bags or containers do not breathe oxygen and can suffocate the seeds over time. After 3 months of this, sow the seeds – and you can bury them a bit but not too much (they need light to germinate). They should germinate within 3 days or so, and some may already have started germinating while in the fridge. If they do, simply sow them carefully and cover them to help them anchor themselves into the soil.
References
Baskin CC, Baskin JM. Seeds: Ecology, Biogeography, and Evolution of Dormancy and Germination. Second Edition. 2014. Academic Press: San Diego, California
Deno N. First Supplement to the Second Edition of Seed Germination Theory and Practice. 1996. Self-Published. Available online by the United States Department of Agriculture at http://naldc.nal.usda.gov/catalog/41279
Martin MC. An ecological life history of Geranium maculatum. American midland naturalist. 1965 Jan 1:111-49.