Gently remove petals from peony blooms, discarding the green base and stamens.
Bring 4 cups of water to a boil. Pour over petals and steep 10 minutes to overnight (longer = more flavor and color).
Strain tea through a fine mesh strainer, pressing petals gently. You need about 4 cups of liquid.
Pour strained tea into a saucepan. Add lemon juice (watch the color change!).
Bring to a boil. Slowly add pectin while stirring constantly. Boil for 1 minute.
Add sugar all at once, stirring to dissolve. Return to a rolling boil for 1-2 minutes.
Remove from heat. Skim foam if desired.
Ladle into prepared jars, leaving ¼ inch headspace. Wipe rims, apply lids.
For shelf storage: Process in water bath canner 10 minutes. Cool 24 hours and check seals.
For refrigerator jelly: Cool to room temperature and refrigerate. Use within 3-4 weeks.