How to Deadhead Marigolds (For Continuous Summer Blooms)

Walk around the marigold plant or tray and look at the flower heads. Spent ones have browned, curled petals or are starting to dry into a pointed seed pod. Fresh buds are smaller, tightly closed, and bright green at the base. The buds are what you want to leave alone - those are the next round of blooms.

Amy points out on the video that you can tell a spent head by feel as much as by sight. A flower that is ready to come off feels papery and slightly loose at the stem. A bud feels firm and slightly sticky. Once you have done a few you stop second-guessing.

This is the whole move. Pinch the spent head between your thumb and forefinger right where the base of the bloom meets the green stem. Give it a quick sideways pop. The head comes off cleanly with a tiny snap. No scissors, no shears, no measuring.

Unlike geraniums, you do not need to trace the stem down to a knuckle. Scott calls it dandelion-easy and that is the right way to think about it. If the head resists, slide your fingers up another quarter inch toward the bloom and try again - sometimes you grab too low and catch healthy stem with it.

Here is where marigolds earn their reputation as a pest plant. Each spent head still carries the pungent marigold scent that deer, rabbits, and most chewing bugs avoid. Do not throw the heads in the compost or the yard waste. Drop them in a small bucket, bowl, or paper bag as you go.

Scott holds up a handful in the video and the heads look like little dried pom-poms. That is exactly how they should look - papery, dry, and still smelling faintly of marigold when you crush one between your fingers.

Take the collected heads, crush them lightly between your hands or with a mortar and pestle, and sprinkle the pieces around the base of the plants you want protected. Hostas, lettuce, beans, and any bedding flowers that deer love are good places to start.

The scent does most of the work for the first week or two. After that, the smell fades and you top up with the next round of deadheaded heads. Scott is honest in the video that this is not foolproof - a determined deer or a really hungry rabbit will eat anything - but for most yards the marigold sprinkle cuts the damage noticeably.

While you are at the plant, pick off any yellow leaves or fully spent stems hiding in the foliage. Amy pinches off a few of the tiny early buds in the video too - she explains that the plant is still small enough that the energy is better spent thickening up rather than blooming, so on young plants you can sacrifice the first few buds and the plant fills out faster.

Then feed. Marigolds in pots and trays exhaust the soil fast and a water-soluble flower fertilizer at label rate refills the bank. Apply to soil that is already damp so the salts do not burn the roots.

Marigolds bloom in waves. Within three or four days of a deadheading pass, the next round of buds opens and the plant looks full again. Make the pop-and-save routine a habit - one minute per plant, twice a week, with a coffee in your other hand.

Stay on this rhythm from June through the first hard frost. A row of marigolds that gets deadheaded consistently will bloom for four or five months straight. Stop deadheading and the plant puts its energy into seed production instead of flowers, and the show is over by mid-August.