. . . No flower seeds available at all. I mostly do veggies, herbs & nutritious "weeds" that can be used like greens. When I get a chance to clean & germination test I may list (if they are still viable) some older Dandelion, Dill, Cilantro, Stinging Nettle & Purslane (Portulaca oleracea). But that is not the Portulaca with larger showy flowers in many colors. It has tiny yellow flowers 1/4" or smaller.
. . . Good idea. Purslane is one of what they call "beneficial weeds". The tap root brings minerals up from lower in the soil profile,It does not compete for nutrients, it's low growing habit does not shade other plants & it's spreading growth helps increase humidity in the garden.