Haworthias are easy peasy lemon squeezey!
they actively grow during spring and fall — at those times you should water deeply until you see water dripping out of the drainage holes, and then don’t water again until the soil is *completely* dry. during high summer (july and august) they are dormant and shouldn’t be watered, and in winter they should be watered rarely, about once per month.
provide gritty, fast-draining soil. lots of pumice or gravel! the most important thing to remember about haworthias is that they like bright light, but not full sunlight. morning sun or afternoons in bright shade are ideal.