Updated 16.7.2026

Anyone who has experienced tomato plants suddenly wilting in midsummer—even after just watering them—knows that helpless feeling. Or strawberries that flower beautifully but yield tiny, tasteless fruits. Or zucchini that simply gives up halfway.

Most of the time, it's not a lack of watering. It's the soil.

And that's where zeolite comes in. Not as a miracle cure—but as a natural helper that improves the soil so your plants finally get what they need: water when they need it. Nutrients when they need them. And soil where they truly thrive.

In this article, we'll look at how zeolite specifically works for various vegetable and fruit plants—with practical tips you can implement immediately.

Tomatoes: Blossom end rot be gone – and finally consistent supply

Tomatoes are demanding. They need a lot of water, a lot of nutrients – but consistently. Fluctuations in water balance are one of the most common reasons for blossom end rot, that brown-black, sunken spot on the blossom end of the fruit that ruins summer for so many hobby gardeners.

The cause is usually not a calcium deficiency itself – but rather that the plant cannot absorb calcium because the soil was too dry or too wet. Calcium only travels into the plant with the water flow. If the soil dries out significantly in between, transport stalls – and the fruit suffers.

Zeolite stores water in its porous structure and releases it slowly. This keeps soil moisture more consistent – exactly what tomatoes love. At the same time, zeolite can bind calcium and make it available in a buffered way.

Practical tip: When planting tomatoes, add a good handful of BODENKRAFT Zeolith (approx. 50–80 g) directly into the planting hole and mix with soil. You can also work a thin layer around the plant. If you want to be extra safe, combine this with GRÜNKRAFT CALCIUM – this directly supplies the soil with calcium, which zeolite can then store and release in controlled doses.

Strawberries: More flavor, healthier plants

Strawberries are actually modest – but on depleted soils, they show it clearly: small fruits, pale taste, susceptible plants. What strawberries really like is loose, well-aerated soil that retains moisture but doesn't become waterlogged.

Zeolite can do exactly that. Its porous structure improves soil structure – the soil remains loose, allows air through, but also holds water. For strawberries, which root shallowly and are sensitive to fluctuations, this is ideal.

Another point: strawberries need potassium for fruit development. Potassium is a nutrient that is quickly leached out of light soils – zeolite can bind it and keep it in the root area.

Practical tip: When creating a new strawberry bed, incorporate BODENKRAFT PUR broadly – about 1–2 kg per square meter, hoed in to a depth of 10 cm. For existing beds, work in a maintenance amount of 200–300 g per square meter superficially in spring. You'll taste the difference at harvest.

Bell peppers and chili: They love warmth – but not drought stress

Bell peppers and chili need warmth and are extremely sensitive to drought stress. Anyone who has had pepper plants in pots knows this: forget to water once, and the blossoms fall off. Water too much, and the roots suffer.

In pots, zeolite is particularly valuable because potted plants are generally more susceptible to drying out than garden plants. A substrate with zeolite content stores water significantly longer and releases it more evenly – this means less stress for the plant and the gardener.

Practical tip: When potting, replace about 10–15% of the substrate volume with BODENKRAFT PUR and mix thoroughly. This sounds like a lot – but potted plants will thank you with stable growth, even if you couldn't water for two days.

Zucchini and pumpkins: Large growth needs great support

Zucchini and pumpkins are heavy feeders – they need a lot of nutrients and a lot of water. At the same time, they have an enormous root system that extends deep into the soil. On nutrient-poor or poorly structured soils, they quickly reach their limits.

Zeolite helps here on two levels: It improves the soil structure so that roots can penetrate deeper and more easily. And it retains nutrients like nitrogen and potassium in the soil, which would otherwise be washed out by heavy watering or rain.

Particularly exciting: If you combine zucchini with compost and zeolite, a real nutrient depot is created. The compost provides organic matter and nutrients – zeolite ensures that these nutrients do not immediately disappear but remain available gradually.

Practical tip: Before planting, prepare the bed generously with BODENKRAFT PUR and well-rotted compost. About 1–2 kg of zeolite per planting site, deeply incorporated. Zucchini will thank you with lush growth – perhaps even too lush, as you know.

Lettuce and leafy greens: Grow fast, suffer fast

Lettuce, spinach, chard – they all grow quickly and therefore need a lot of nitrogen in the short term. The problem: nitrogen in the form of ammonium is quickly washed out or rendered unavailable in many soils. Zeolite can bind ammonium particularly well – this is one of its best-known properties.

What this means in practice: If you fertilize lettuce with organic nitrogen fertilizer (horn meal, compost) and also have zeolite in the soil, more nitrogen remains where it is needed – in the root area. The result: stronger, more uniform leaf growth.

Practical tip: For lettuce, a moderate amount is sufficient – 200–400 g of BODENKRAFT Zeolith per square meter, worked into the top 5–10 cm. For multiple successive sowings over the season, a small refresh with each new sowing is worthwhile.

Berry bushes and fruit trees: Long-term investment

Blueberries, raspberries, currants, gooseberries – and of course apple or pear trees. These perennial plants often stay in the same spot for years. Investing well in the soil once here provides lasting benefits.

Zeolite remains permanently in the soil and builds up its effect over years. Especially for deep-rooted fruit trees, thorough soil preparation during planting is crucial – because later it's almost impossible to access the root zone.

Blueberries are a special case: They need acidic soil (pH 4.5–5.5). Here, zeolite should be used with caution, as it can slightly stabilize the pH value – which can be helpful or undesirable for blueberries depending on the initial situation. If in doubt, first measure the soil pH.

Practical tip: For berry bushes, generously add BODENKRAFT Zeolith PUR to the planting hole – about 200–500 g depending on the plant size. For existing bushes, you can work zeolite into the soil around the plant in spring, without damaging the roots.

The most important things at a glance

Zeolite works for all these plants in the same fundamental way: it improves the soil as a storage and living environment. Water remains available longer. Nutrients are retained instead of being washed out. The soil structure becomes looser and more vibrant.

What differs is the amount, depth, and combination with other materials. Heavy feeders like zucchini need more than modest lettuces. Potted plants benefit more than deep-rooted trees. And combining zeolite with good compost yields more than zeolite alone.

If you don't know any of our products yet: The BODENKRAFT activated zeolite is our activated zeolite specifically for garden use – in the right granulation to be quickly incorporated into the soil and effective immediately. If you want to build up your soil holistically, also check out the AM PLUS – active microorganisms that work perfectly with zeolite and really kickstart soil life.

Good luck with the gardening season – and may your tomatoes finally turn out this year just as you envision them. 🍅

→ What can naturally support your garden soil can be found in our garden collection.