The Official Cannabis Independent strain guides
Runtz Cake No 70 Shop
The Official Cannabis collection · sheet 70No 70 · Runtz Cakevs Rainbow Runtz

Comparison

Runtz Cake vs Rainbow Runtz

Both carry the Runtz name and neither has a settled origin: Runtz Cake’s breeder is disputed, and Leafly describes Rainbow Runtz as a Zkittlez × DoSiDos double cross that by 2024 was also Wizard Trees’ Runtz × RS11.1,2,3 Both have small lab samples: 21.73% median THC for Rainbow Runtz (77 tests) and 20.00% for Runtz Cake (51, all from one state).4

Side by side

Runtz CakeRainbow Runtz
TypeHybrid; Leafly rates it mostly calming, Weedmaps calls it indica-dominant1,2Indica per Leafly; mostly calming3
LineageWedding Cake × White Runtz; breeder disputed1,2Zkittlez × DoSiDos; also Wizard Trees’ Runtz × RS113
Median THC (state lab tests)20.00% (51 tests); small sample, one state21.73% (77 tests); small sample
Middle half of THC results19.00%–21.00%17.89%–25.33%
Top terpenes (median)Too few tests report individual terpenes (0 of 51)Too few tests report individual terpenes
Leafly’s top effectsRelaxed, euphoric, giggly1Relaxed, sleepy, hungry3
Flavor (Leafly)Flowery, vanilla, diesel1Pear, rose, flowery3
Leafly THC listing18%125%3

Lab rows come from the same state lab dataset and matching rules for both strains.4

Lab-tested THC: Runtz Cake vs Rainbow Runtz

16% 18% 20% 22% 24% 26% Rainbow Runtz Rainbow Runtz: median 21.73%, middle half 17.89%–25.33%, 77 tests 21.7% n=77 Runtz Cake Runtz Cake: median 20.00%, middle half 19.00%–21.00%, 51 tests 20.0% n=51 Median total THC (dot) and middle half of tests (bar)
Median and middle half of total THC in state lab tests. Small sample: Runtz Cake has only 51 tests; Rainbow Runtz has only 77 tests.4

The Z connection

Zkittlez, which Leafly now lists as The Original Z, is a parent of White Runtz and part of the double cross Leafly gives for the original Rainbow Runtz.3,5,6 Rainbow Runtz has its own guide in the Official Cannabis network at rainbowruntz.com.

Which is easier to find

On Oct 4, 2026, 7 stores within 50 miles of Los Angeles listed Runtz Cake flower on Weedmaps, against 95 stores for Rainbow Runtz; around Detroit the counts were 5 and 27.7

More comparisons

Sources

  1. Leafly, Runtz Cake strain information. Accessed Oct 4, 2026.
  2. Weedmaps, Runtz Cake strain page. Accessed Oct 4, 2026.
  3. Leafly, Rainbow Runtz (aka Rainbow Runts) strain information. Accessed Oct 4, 2026.
  4. Cannlytics (CC BY 4.0), cannabis_results: public state lab results (filtered and aggregated by Official Cannabis). Accessed Oct 4, 2026.
  5. Leafly, The Original Z (aka Z) strain information. Accessed Oct 4, 2026.
  6. Leafly, White Runtz strain information. Accessed Oct 4, 2026.
  7. Weedmaps listings, compiled by Official Cannabis, Weedmaps flower menu snapshot, 27 US markets, Oct 4, 2026. Accessed Oct 4, 2026.