How to choose my flower drying silica gel crystals?


Have you ever wished you could freeze a moment in time? Perhaps you received a bouquet from a special occasion, or you’ve grown a garden full of blooms you’re proud of. Drying flowers allows you to preserve these moments, and silica gel crystals are a gardener’s secret weapon in doing just that. This guide will walk you through the different types of silica gel crystals – all white, white and blue, white and orange – and help you decide which is best for your floral preservation needs.

Understanding Silica Gel Crystals

Silica gel is a desiccant, which means it’s used to absorb moisture. This is why you often find little packets of it in packaging – to keep products dry. When it comes to flower drying, silica gel is particularly effective because it draws out moisture from the flowers quickly, preserving their shape and color far better than air drying.

Types of Silica Gel Crystals

There are three main types of silica gel crystals:

  • All White: The “standard” silica gel, with no indicator beads.
  • White and Blue: Contains indicator beads that turn pink when it’s time to dry out the gel. The indicator blue silica gel crystals using is Cobalt Chloride, which is toxic and is banned by the EU.
  • White and Orange: Indicator beads turn from orange to green, signaling moisture absorption, and they are non-toxic.

How Silica Gel Works

The science behind silica gel is pretty straightforward – it’s a form of silicon dioxide, which is a natural absorbent. When placed amongst flower petals, it acts like a sponge, drawing out the moisture and thereby preserving the flowers.

All White Silica Gel Crystals

Purity and Performance

The all-white silica gel is often favored for its purity. With no color indicators to potentially transfer onto your flowers, it’s a safe choice for preserving their natural beauty.

Handling and Safety

Though straightforward to use, it’s crucial to wear gloves when handling silica gel, as the fine particles can irritate skin. Always ensure your workspace is well-ventilated.

White and Blue Silica Gel Crystals

Indicator Crystals

The blue crystals serve as a handy visual guide, turning pink to let you know when the gel has absorbed all the moisture it can handle. This is especially useful for beginners or those working on larger batches of flowers.

When to Use

Choose white and blue silica gel when working with thicker flowers like roses, which require a clear indicator to prevent over-drying or under-drying. However, since the blue silica gel is toxic, I more recommend you use orange silica gel crystals which are also indicator crystals while non-toxic.

Maintenance and Reusability

The great thing about silica gel is that it can be reused. By heating in the oven as per the manufacturer’s instructions, the blue beads will turn back to their original color, ready for your next preservation project.

White and Orange Silica Gel Crystals

Non-Toxic Indicator

For those concerned about safety, particularly around pets and children, the white and orange silica gel is a stellar choice. The orange beads are non-toxic and change to green when moist.

Specific Applications

This type of silica gel works wonders for delicate flowers or those with a lighter color palette, as there is no risk of color transfer from the indicator beads.

Longevity and Care

Similar to its blue counterpart, the orange indicator beads can be rejuvenated with a bit of heat, making your silica gel as good as new.

Choosing the Right Silica Gel for Your Flowers

Comparing Features

  • All White: Best for purity and non-indicator preferences.
  • White and Blue: Toxic and Not recommend.
  • White and Orange: Safe around pets and children, with non-toxic indicators. Also, ideal for thick flowers and visual moisture indicators.

Matching Silica Gel to Flower Type

Match the silica gel to your flower type for the best results. Delicate flowers work well with all white or white and orange, while thicker blooms are best paired with the white and blue.

Storage and Preparation

Ensure your flowers are fresh but dry to the touch before burying them in silica gel. Store in an airtight container to prevent moisture from seeping in.


Choosing the right silica gel crystals for drying flowers is a simple yet crucial step in preserving the beauty that nature bestows upon us. Whether you’re a seasoned florist or a DIY enthusiast, understanding the nuances between all white, white and blue, and white and orange silica gel crystals enables you to capture and keep those floral memories alive. So, go ahead, experiment with silica gel drying, and let the preserved flowers add a timeless charm to your home decor or keepsakes.


Can I reuse silica gel crystals after drying flowers?
Absolutely! Just dry out the gel as per the instructions, and it’s ready for another round.

How long does it take to dry flowers using silica gel?
It varies depending on the flower, but typically, it takes between 2 to 7 days.

Are there any flowers that should not be dried using silica gel?
Very thick flowers might not dry well, as they’re prone to rotting if moisture remains. Experimentation is key!

Can colored silica gels stain my flowers?
There’s a slight chance if the gel is over-saturated. Opt for all-white silica gel if you’re concerned.

How do I know when it’s time to replace my silica gel crystals?
When the crystals no longer change color after drying out, it’s time for a new batch.