Ferment
Wash cucumbers. Remove a 1/16-inch slice from each blossom end; leave about 1/4 inch of stem.
Put half the dill and optional spices in a clean, suitable fermentation container. Add cucumbers, then remaining dill and spices.
Dissolve the salt in the 5% vinegar and water. Pour over cucumbers. Apply a suitable cover and weight so cucumbers remain submerged.
Ferment at 70–75°F for about 3–4 weeks. At 55–65°F, allow 5–6 weeks. Avoid temperatures above 80°F. Check several times weekly and promptly remove surface scum or mold. Discard the batch if pickles become soft, slimy, or develop a disagreeable odor.
Can after full fermentation
Pour the brine into a pan, heat slowly to a boil, and simmer 5 minutes. Filter through paper coffee filters if desired.
Pack fully fermented pickles into jars and cover with hot brine, leaving 1/2-inch headspace. Apply lids.
Validated low-temperature option for this recipe only: place jars on a rack in a canner half filled with 120–140°F water. Add hot water to 1 inch above jar tops. Maintain 180–185°F for 30 minutes, verifying that the water stays at least 180°F for the full 30 minutes. Temperatures above 185°F may soften pickles.
Alternatively, use the recipe’s altitude-adjusted boiling-water process: pints 10/15/20 minutes and quarts 15/20/25 minutes at 0–1,000 ft / 1,001–6,000 ft / above 6,000 ft.