Labor Day Cuttings: 7 Annuals to Propagate This Weekend So They Survive Frost as Free Plants
Coleus, geranium and 5 more annuals root fast from a cutting — free plants that survive frost. Here’s how, plus the one popular annual not worth cloning.
Coleus, geranium, begonia, sweet potato vine, impatiens, fuchsia, and lantana all root reliably from a cutting taken this weekend — all seven, confirmed by two land-grant extension propagation guides.[1][2] The one popular annual that doesn’t make this list is the marigold, and it’s not because marigolds won’t root. They root fine. It’s that marigolds are true annuals, wired to finish their life cycle in one season no matter how well you baby them through winter, while the other seven are tender perennials only pretending to be annuals because frost cuts their season short.
That distinction is the whole trick. In their native ranges, coleus and fuchsia are shrubby perennials, geranium is a woody-based subshrub, sweet potato vine is a perennial vine grown from a tuber, and lantana is a small perennial shrub — every one of them dies from cold, not from age. Root a cutting before the first freeze and you’re not starting a new plant next spring; you’re carrying the exact same plant through the one season it can’t survive outdoors. A marigold is genetically finished by the time frost shows up — most varieties germinate in about a week and are back in bloom within roughly eight weeks of sowing, so a fresh seed packet next April beats a fussy jar on the windowsill all winter.
On my own counter this week: seven jars, one cutting each. By day eight the coleus and sweet potato vine already show white root nubs pushing through the cut end; the begonia jar looks untouched, and that’s expected — extension data puts begonia’s node-based rooting at four to six weeks, roughly triple the coleus timeline.[1] If your begonia jar looks like nothing’s happening after a week, it isn’t behind. It’s on schedule.
The 7 Annuals That Root Reliably From a Cutting
Coleus and sweet potato vine root fastest, begonia is the slow one, and geranium is the only cutting that does better in a moist mix than in a jar of water.
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| Annual | Best Method | First Visible Roots | Ready to Pot Up |
|---|---|---|---|
| Coleus | Water or moist perlite | ~1–1.5 weeks | 3–4 weeks |
| Sweet Potato Vine | Water | ~1–1.5 weeks | 2–3 weeks |
| Impatiens | Water | ~1–2 weeks | 2–3 weeks |
| Geranium | Moist perlite (skip standing water — stems rot easily) | ~2 weeks | 3–4 weeks |
| Fuchsia | Moist perlite, humidity tent | ~2–3 weeks | 3–4 weeks |
| Lantana | Moist perlite, bright light | ~3–4 weeks | 4–6 weeks |
| Begonia | Moist perlite or soil, cut at a leaf node | ~4–6 weeks | 2–3 months |
Everything on this list except begonia is pot-ready within a month. If you’re taking cuttings from more than one plant this weekend, start the begonia first — it needs the longest head start.
Why Marigolds Don’t Make the Cut
A marigold cutting will root in a couple of weeks, but you’ll spend the whole winter nursing a plant that was always going to need replacing in spring anyway. That’s the real difference between marigolds and the seven above: French marigolds bloom again about seven to eight weeks after sowing, so a $3 seed packet next April gets you flowers almost as fast as a windowsill cutting would — without six months of watering, repotting, and hunting for aphids on a plant stuck indoors. Save the jar space for something that can’t just be re-bought at the garden center in April.
How to Take the Cutting This Weekend
Cut a 2 to 6 inch piece from a healthy stem tip, just below a leaf node, and strip off the lower half of the leaves plus any flowers or buds — flowers pull energy away from root development. Set the cutting in a jar of water or a pot of moist perlite, keep it somewhere bright but out of direct sun, and change water every few days if you’re rooting in a jar. Labor Day (September 7 this year) lands close to the last comfortable cutting window for most of the country, but your actual deadline depends on your own first-frost date — check yours here before you assume you have more time than you do. Geranium is the one exception to the water method — its fleshy stems rot before they root if left standing wet, so BE’s geranium propagation guide walks through the moist-mix method and an alternative leaf-bud technique in more depth.
Where to Put Them Once They Root
Lantana is the one plant on this list that sulks and drops leaves without bright light, so give it your sunniest window — everything else tolerates average bright indirect light through winter. A loose plastic bag over a potted cutting holds humidity while roots form, but pull it off once you see new leaf growth or mold becomes a risk. If this is your first winter keeping cuttings alive indoors, BE’s general houseplant propagation guide covers humidity tents and light setups for the whole growing season, not just this one weekend.
Seven jars, seven free plants next spring, and zero seed packets to buy in April — as long as you take the cuttings before the frost does the deciding for you.
Sources
- Iowa State University Extension and Outreach. How to Propagate Annuals from Cuttings. Yard and Garden
- Purdue University Extension. New Plants From Cuttings. Purdue Consumer Horticulture
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