Transplanted Saguaro Life Expectancy: Same as Wild, If Not Overwatered

Average Lifespan of a Transplanted Saguaro? Asks for average life expectancy after transplant. Same as Non-Transplanted (300–350 Years Max) Greg: transplanted saguaros live as long as wild ones, unless overwatered. Larg

Pruning Large Milk Cactus (Euphorbia): Toxic Sap Warning

8x8 ft Milk Cactus (Euphorbia) Too Big for House—How to Prune Safely 25-year-old milk cactus (Euphorbia) must be cut back <50% to fit indoors. Owner wants safe pruning method. Trim Like a Bush, But Beware the Sap Greg:

Broken Totem Pole Cactus: Both Pieces Can Root in Phoenix

New Totem Pole Cactus Fell, Broke 1.5 ft Piece—Can Both Parts Live? Owner in Phoenix dropped new totem pole cactus; 1.5 ft top broke off. Asks if broken piece and rooted base can be planted. Yes to Both Broken piece: c

Succulent Watering Rule: Soak Until Dry, Not Teaspoons

How Dry Is Too Dry? Soil Cracked, Owner Afraid to Overwater Owner lets succulent soil crack completely, fears overwatering, asks for rule of thumb and signs of thirst. Gregs Rule Soil dry to the touch = water thoroughly

Starting Cuttings: Silver Dollar (Astrophytum) No, Prickly Pear Yes

Silver Dollar Cactus Cuttings Dont Work; Prickly Pear Pads Easy Asks about starting silver dollar (likely Astrophytum asterias) and prickly pear cuttings. Gregs Answer Silver dollar (Astrophytum): cuttings generally do

Cactus Leaning and Growing Toward Floor: Etiolation from Low Light

8-Ft Indoor Cactus Bending Over, Firm at Bend—Over-Fertilized? 4-year-old cactus doubled in size, tallest parts falling over toward floor. Center of bend is firm. Owner asks if over-feeding caused weak growth. Cause: In

Ocotillo Cold Hardiness: Survives 22°F (10° Below Freezing), Not -10°F

Can Ocotillo Handle 10° Below Freezing at 4000 ft Elevation? Owner at ~4000 ft, winters to 10° below freezing, wants drought-tolerant, freeze-hardy plants. Asks if ocotillo survives. Yes, If You Mean 22°F (10° Below 32°

Paddle Plant (Flapjack) Basics: Water, Light, Soil

Walmart Paddle Plant/Flapjack—No Label, Need Care Info Owner eyes a paddle plant at Walmart, wants basic care. General Succulent Care Water regularly but let soil dry completely between waterings. Intense light, but no

CO2 Chamber for Pelecyphora aselliformis: Not Proven, Try Grafting

Can CO2 Enrichment Boost Pelecyphora Health? Asks if a CO2-enriched chamber with lights and liquid nutrients helps Pelecyphora aselliformis. Greg: Unproven; Most Cacti Transpire at Night Greg isnt sure. Suggests graftin

Removing Large Barrel Cacti: Free Sign or Nursery Buyback

Several Large Barrel Cacti in Front Yard—Want Them Gone Easily Owner asks for an easy removal method. Easy Options Post Free Cacti sign—enthusiasts will dig them up. If very large, a nursery may pay for them and handle

Grafting and Accelerated Aging: Greg Doesn't Know, But Notes Benefits

Does Grafting Slow Cactus to Fast Rootstock Shorten Scion Life? Reader heard grafting accelerates growth but causes accelerated aging/death of scion. Asks if true. Gregs Take: Unknown, But Grafting Often Extends Life Gr

Century Plant (Agave) Die-Off After Landscaping: Weevils or Plastic Liner?

Rock Garden Agaves: 3-4 Large Plants Tipped Over and Died Post-Cleanup Austin, TX garden: 20+ agaves, mother bloomed 4 yrs ago. Landscaper cleaned rocks, replaced plastic liner, trimmed dead lower leaves, moved pups. Sin

Fast-Growing Saguaro in Texas: 12 ft in 20 Years Is Normal With Water

Saguaro Growth Rate: 3 ft (1992) → 12 ft Now; Brothers 4 ft → 7 ft Owner in Del Rio, TX asks if this exceeds normal saguaro growth (literature says slow). Water Accelerates Growth Dramatically Greg explains: wild saguar

Eradicating Invasive Aloe Vera: Physical Removal Best, No Chemical Magic

Massive Aloe Vera Spread Around Tank—Prickly, Breaks, Regrows Owner needs to completely eradicate a huge area of aloe vera. Thrown pieces root and thrive. Asks for a spray to kill them. No Effective Herbicide; Hire Remo

20-Foot Cactus in New Hampshire: Won't Survive Freeze, Must Cut or Heat

40-Year-Old 20-Ft Cactus Too Big for Garage—Winter Options? Fathers 20-ft skinny cactus with basal pups, short spines, brought in every winter. Now too big. Building insulated box with house-heat vent. Asks minimum tempe

Forcing Christmas Cactus Bloom: Dark Period in December

Light/Dark Regimen for Holiday Blooms Owner asks: 8–11 hours daylight vs. complete darkness day and night—which is correct? Simple Method: Dark Room/Closet for 2 Weeks Before Christmas Greg says place in a dark room or

Aloe with Black Sticky Ooze: Overwatering Rot, Cold Sensitivity

Indoor Aloe (Non-vera): Black Ooze at Base, Dry Lower Leaves Happy 6-month-old aloe suddenly has black sticky substance at base, lower leaves drying. Owner watered ~every 2 weeks; recent cold by single-pane window. Panic

Kalanchoe thyrsiflora Care: Soak-and-Dry Watering, Not Teaspoons

New Paddle Plant: Gritty Soil Dries Overnight—Is That Normal? Owner bought a Kalanchoe thyrsiflora in a 6-inch pot with gritty soil. Watered once, soil dry next day. Asks if this is normal, how to tell if underwatered, a

Planting Barrel Cacti in Pots: 50/50 Sand and Potting Soil for Phoenix Patio

Barrel Cacti in Pots: Sand vs. Potting Soil? Phoenix patio gardener has barrel cacti in potting soil, told to use sand. Asks which is correct. Best Mix: 50% Sand, 50% Potting Soil Greg recommends a 1:1 blend. Pure sand

Cutting Back a Tall Cactus in New York: Replant the Top, Wait for Spring

3-Foot Summer Growth Makes Cactus Too Big for Indoors New York gardeners cactus (possibly Pilosocereus royenii) grew 3 ft, now too tall to bring inside. Asks if she can cut it back and what to do with the piece. Yes—Cut