
Hyacinths aren’t just for adding a pop of color to your garden beds; they’re also absolute rockstars on a sunny windowsill. One of the coolest ways to grow them indoors—no matter the season—is by using a hyacinth glass. Now, you might be wondering, “Can’t I just use a regular jar?” Honestly? Not really. Hyacinth glasses are specifically engineered for this job. Let’s dive into why these little vases are a game-changer for your indoor gardening.
Anatomy of a Hyacinth Glass
To get a hyacinth to bloom indoors without the bulb rotting, you need a very specific setup. You can find these glasses at most garden centers or easily snag them online.
The unique shape of a hyacinth glass does two things: it keeps the bulb high and dry so it doesn’t get mushy, and it provides the structural support needed to hold up those heavy, fragrant flower stalks.
Think of it like an hourglass. The bottom is wide and bulbous to hold water, it cinches in the middle, and then flares out at the top into a little “cup” where the bulb sits. These dimensions are perfectly tailored to the size of a standard hyacinth bulb.
Pro Tip: Is there anything cooler than watching nature do its thing? Because these glasses are clear, you get a front-row seat to the magic. You can watch those tiny white roots sprout and grow day by day—it’s a total science fair project for grown-ups!
How to Force Hyacinths in a Glass: Step-by-Step
- Fill your glass with water until the level is just below the neck where the “cup” begins.
- Place your bulb upright in the top section.
- Initially, the water should just barely touch the bottom of the bulb (only by a few millimeters).
- Keep a close eye on it! As soon as you see those first little roots emerge, it’s time for a slight adjustment.
- Pour out a bit of water so there’s about a 1/4 inch (0.5 cm) gap between the water surface and the base of the bulb. This prevents rot while the roots reach down for a drink.
- Move the glass to a dark, chilly spot (ideally between 40°F and 48°F).
- For the best results, place a little paper “hat” or cone over the emerging sprout to keep it in the dark.
- Gradually introduce your hyacinth to more light over time.
- Once the growing flower bud is strong enough to start lifting that paper hat, you can take the cover off for good.
- Now, move the glass to your favorite sunny spot and get ready for that incredible fragrance!
Pro Tip: Did you know that people have been forcing hyacinths in glasses since the 18th century? It’s a classic gardening tradition that’s making a huge comeback—and for good reason!

