Press your lips together, add vocal cord vibration, then release.

Americans pronounce bloom as BLOOM (/blum/). You'll hear it in sentences like "The spring flowers are starting to bloom" or "The rose garden is in full bloom in the spring" — more examples below.
Record yourself saying "bloom" and play it back. The mic stays on your device — nothing's uploaded.
1 syllable, 4 sounds. Explore each sound's mouth shape and how it's made.
Press your lips together, add vocal cord vibration, then release.

Place the tip of your tongue against the alveolar ridge just behind your top front teeth, the same contact point as /t/, /d/, and /n/. The difference is what happens to the air: for /l/, you let it flow continuously around the <em>sides</em> of the tongue (that's why /l/ is called a lateral). Turn your voice on the whole time. Lips stay relaxed, no rounding or flaring. For the Dark L variant at the end of a syllable, also pull the back of the tongue up and back toward the soft palate.

Round your lips into a tight circle. Let your tongue rest in the middle of your mouth, slightly raised.
Press your lips together. Air flows through your nose. Vocal cords vibrate.

Click any sentence to see the full breakdown — every link, every reduction, every flap-T.