Don’t Throw Away Your Empty Milk Jugs This Fall, Gardeners Are Saving Them for Winter
Empty milk jugs can become seed-starting containers once cold weather arrives. Rather than starting every plant indoors under grow lights, gardeners use the plastic containers to sow seeds outside and leave them exposed to winter conditions.
Reddit user u/duchessbobbington used a few dozen jugs for winter sowing, filling the bottoms with soil while leaving the upper sections attached as covers. By spring, some containers held clusters of seedlings while others had only a few plants emerging.
September is too early for the pictured winter-sowing setup in many climates, but it is a good time to start keeping the containers instead of sending them to recycling. The project used enough jugs to cover a large section of patio, so collecting them before sowing season avoids needing dozens at once.
Dozens of Milk Jugs Became Outdoor Seed Containers
Cut milk jugs cover the patio, with soil filling the bottom sections and the upper halves folded back or left in place. Some containers remain closed because their seeds were planted later and had not sprouted when the photos were taken.
The setup lets dozens of seed batches stay outside without individual pots taking over an indoor windowsill. Handwritten labels on the plastic keep the different plantings separated.
Blue Grama Grass Filled Some Jugs With Thin Green Shoots
One container holds rows of blue grama grass (Bouteloua gracilis) emerging across the soil. Instead of one plant per container, seeds were spread across the broad bottom of the jug, creating a compact nursery for many seedlings.
The seedlings were still small when the containers had to be opened. Warm conditions created another problem: leaving the translucent covers closed could trap too much heat around new growth.
Different Native Plants Produced Very Different Results
Not every jug germinated at the same rate. These containers include black-eyed Susan, side-oats grama grass, yarrow, and plains tickseed, with some sections packed with growth while others remain sparse.
That difference is visible across the full group of containers as well. Winter sowing does not make every seed emerge at once, so some jugs can remain almost empty while neighboring containers have dozens of shoots.
Dotted Blazing Star Emerged in Larger Shoots
Dotted blazing star (Liatris punctata) looks different from the fine grass seedlings nearby. Several thicker green shoots push through the soil with paired leaves appearing beside them.
Opening the jugs became necessary once temperatures rose. With a few dozen containers outside, moving every jug between sunny and shaded locations was not practical, so they received morning sun followed by shade later in the day.
One Jug Produced Just a Single Prairie Clover
One of the starkest results came from white prairie clover (Dalea candida). Instead of a dense patch of seedlings, the container produced one visible sprout.
Other gardeners in the discussion reported uneven results as well. One commenter said some February plantings had still not emerged, while another used cups inside plastic bins so the lids could be removed when temperatures climbed.
Saving milk jugs in fall gives the containers another use before winter sowing begins. Instead of buying dozens of separate pots, each jug supplies both a soil container and a translucent cover that can be opened once spring temperatures start climbing.
Image credits go to u/duchessbobbington.