My first good success with Drosera adelae was in La Mesa, California, in the south of San Diego. That was about 1978. I was growing it in one gallon black plastic nursery cans. The media was 100% sphagnum peat moss. They were kept sitting in trays of R.O. purified water, about two inches deep. They were also in full southern California sunshine, year-'round. They were on a concrete patio, very close to my apartment.
Under these conditions all parts of the plants developed a blood red hue. Which some people find quite attractive. The leaves of any individual plants in the gallon pots had leaves that extended beyond the pot edges on all sides, and the pots would quickly fill with offshoots that developed from lower leaves and roots, even sprouting from roots extending out the bottom drain holes.
One thing I learned early on was that Drosera adelae, just like many other Drosera, was prone to attack by whitefly, spider mites, and aphids. So I learned that whenever newer leaves began showing tip burn, and the newest leaves began to appear stunted, it was most likely due to one of these pests. Since I tried to avoid using pesticide chemicals, I found that submerging the plants, carefully and completely for a week or two, would most often eliminate the pests and restore the plants to vigor and health.