Flapjacks

What's Wrong with My Flapjacks?

Kalanchoe thyrsiflora
Reviewed by Kiersten Rankel M.S.
Quick Answer
1.
Overwatering is the top killer.
Flapjacks stores water in its big paddle leaves, so it rots before it goes thirsty. Check the soil and the base of the stem first.
2.
Light is behind most of the rest.
Without full sun, the leaves lose their signature red color and the plant stretches. A south-facing window or outdoor placement fixes both.
3.
Pups at the base mean the plant is healthy.
Small offsets growing around the base are the plant's future. Even if the main rosette eventually dies after flowering, the pups carry it forward.
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Common Flapjacks Problems

Green leaves, no color

Not enough sun

Flapjacks develops its red and orange leaf edges as a response to intense sun. That color is a stress pigment, not a sign of a sick plant. Without strong direct light, the leaves stay flat green and the paddle shape becomes less dramatic.

Move to the brightest spot available, ideally outdoors in full sun or a south-facing window with at least 4–6 hours of direct sun. The red color comes back within a few weeks of more light. The green leaves already on the plant won't change, but new growth will show the color again.

Mushy leaves

Overwatering and rot

Flapjacks' big paddle-shaped leaves are packed with water-storing cells. Wet soil keeps pushing water into them until they burst from the inside, turning the bottom row soft and glassy first. If the rot reaches the main stem, the whole plant collapses fast.

1. Pull the plant from the pot and shake off the soil
2. Remove every mushy leaf and cut back any brown or soft roots to firm tissue
3. Let the plant air-dry on the counter for a day or two so cuts can callus
4. Repot in dry, gritty cactus mix and wait two weeks before the first light watering

Shriveled leaves

Underwatering

When Flapjacks runs out of water reserves, the paddles pucker and go soft. The leaves lose their firmness and the paddle edges may curl slightly inward. Recovery is fast once the plant drinks.

Soak the soil thoroughly until water drains from the bottom. The paddles should firm back up within a day or two.

If they don't plump up after watering, check the roots. Rot from overwatering can look exactly like thirst from above.

Spots on leaves

Water on the leaves

Flapjacks leaves have a fine powdery coating that water droplets damage on contact, leaving brown or translucent spots. The wide, upward-facing paddles catch overhead watering easily, and the marks are permanent once they form.

1. Water at the soil level, not overhead, from now on.
2. Remove badly spotted leaves at the base if the cosmetic damage bothers you.
3. If you suspect fungal spots (dark halos, spreading), apply a copper fungicide and improve airflow around the plant.
Cold or frost damage

Flapjacks is native to warm parts of South Africa and the large paddle leaves are sensitive to cold. Temperatures below 30°F (-1°C) cause water in the leaf cells to freeze and rupture, leaving sunken, translucent or dark patches that dry out and scar.

1. Move the plant indoors or to a frost-free spot before temperatures drop below 30°F (-1°C).
2. Remove leaves with severe cold damage at the base. Healthy new paddles will replace them.
3. Keep it away from cold windows and drafts in winter.

Whole plant collapsing after bloom

Normal monocarpic death

Flapjacks is monocarpic, meaning the main rosette flowers once and then dies. This is completely normal. The tall flower spike appears on a mature plant after several years, and once flowering is done, that rosette will gradually decline. The plant almost always produces offsets (pups) from the base before this happens, and those pups are the continuation of the plant.

Pests

Mealybugs

White cottony clumps tucked where the paddle leaves meet the stem. Flapjacks' tightly stacked leaf arrangement gives mealybugs good cover, and colonies can build up before becoming obvious.

1. Dab every visible cluster with a cotton swab dipped in 70% isopropyl alcohol
2. Follow up with an isopropyl spray over the whole plant, working between the leaf bases
3. Repeat every 5–7 days for three weeks to catch newly hatched eggs
Aphids on flower spikes

When Flapjacks sends up its tall flower spike, aphids often move in fast. They cluster on the stalk and developing flower buds, sucking sap and leaving sticky honeydew. The flower spike is the most common place to find them.

1. Knock aphids off with a strong stream of water aimed at the spike
2. Spray the spike and buds with insecticidal soap, coating the clusters thoroughly
3. Repeat every 3–4 days until none remain

Preventing Flapjacks Problems

A few consistent habits prevent most of what goes wrong with Flapjacks.
Monthly Check
1
Water only when the soil is completely dry all the way through.
Press a finger or skewer to the bottom of the pot. If there is any moisture, wait. In most indoor conditions that is every two to four weeks, not weekly. Overwatering is the leading cause of death.
2
Use a gritty, fast-draining mix in a pot with a drainage hole.
A 50/50 blend of cactus mix and perlite keeps roots from sitting in moisture. Standing water is how rot starts in those big paddles.
3
Give it full sun or the brightest spot you have.
Direct sun brings out the red leaf edges and keeps the plant compact. Low light produces plain green paddles and a stretched, weak plant.
4
Water at the soil level, never overhead.
The powdery coating on Flapjacks' paddle leaves marks permanently when water hits it. Bottom watering or a narrow-spout can aimed at the soil keeps the foliage clean.
5
Bring it indoors before the first frost.
Flapjacks is not cold-hardy below about 30°F (-1°C). Cold damage to the large paddles is permanent and the marks do not heal.
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About This Article

Kiersten Rankel M.S.
Kiersten Rankel M.S.
Botanical Data Lead at Greg · Plant Scientist
About the Author
Kiersten Rankel holds an M.S. in Ecology & Evolutionary Biology from Tulane University. A certified Louisiana Master Naturalist, she has over a decade of experience in science communication, with research spanning corals, cypress trees, marsh grasses, and more. At Greg, she curates species data and verifies care recommendations against botanical research.
See Kiersten Rankel's full background on LinkedIn.
Editorial Process
Every problem and fix in this article was verified against Greg's botanical database, cross-referenced with USDA hardiness zone data and published horticultural research from the Missouri Botanical Garden, university extension programs, and species-specific literature. The Kalanchoe thyrsiflora care profile reflects documented species behavior combined with years of community grower feedback in Greg.
16,305+ Greg users growing this plant
USDA hardiness zones 9a–11b