Soil Drench & Solution & Product per Plant
Treats root rot
Enter plants, mL of solution per plant and the label rate per litre to get the total solution and productto mix — for treating root, collar and soil pests right at the plant base.
Mix your soil drench
Next: fill your tank to 50 L, stir in 100 mL of product, then apply ~50 mL evenly around each of the 1,000 plants' bases.
Always read the product label for the registered drench rate and water volume; pre-water dry soil so the drench reaches the roots.
Soil drench — key facts
- Total solution
- plants × mL per plant
- Product to mix
- solution × label rate/L
- Treats
- root, collar & soil pests
- Per plant
- ≈ 50–250 mL small plants
- Trees
- ≈ 1–2 L per plant
- Pre-water
- moisten dry soil first
- Stay on label
- never exceed the rate
- Privacy
- Runs in your browser; nothing uploaded
Get the chemical to the roots, not the leaves
Some of the worst crop problems live below the soil line — root rots, collar rot, wilts and soil insects that a foliar spray never reaches. A soil drench solves that by pouring a measured solution at each plant's base so the active ingredient soaks straight into the root zone. The skill is in the quantities: too little misses the roots, too much wastes product and risks injury, and an uneven mix treats some plants and not others.
This tool gives the total solution to make, the product to add, the plant count and the mL per plant from your inputs. Use it to mix exactly the right batch, keep the concentration even across every plant, and stay inside the label rate. Pair it with the Spray & Tank Mix and Dilution Ratio calculators for a complete crop-protection plan.
Reach the root zone
Deliver the active straight to roots and collar.
Mix the exact batch
Know the litres of solution and product to add.
Stay on label
Hit the labelled rate, never over-dose.
Treat every plant evenly
Same per-plant volume across the block.
Frequently Asked Questions
What is a soil drench?+
A soil drench pours a measured volume of fungicide or insecticide solution directly at the base of each plant so the chemical reaches the root zone and soil. It treats root and collar diseases — such as collar rot, root rot and wilt — and soil-dwelling pests that foliar sprays can't reach, because the active ingredient is delivered straight to where the problem lives.
How is the drench amount calculated?+
Total solution = number of plants × mL of solution per plant. The product to add = total solution × the label rate per litre. For example 200 plants at 100 mL each is 20 litres of solution; at 2 mL of product per litre you mix in 40 mL of product. Enter your figures and the tool returns total solution, product, plants and mL per plant.
How much solution per plant should I use?+
Enough to wet the root zone without flooding — commonly 50–250 mL for seedlings and small plants and up to 1–2 litres for established trees, depending on root spread and soil. Moist soil before drenching helps the solution move down rather than run off. Always follow the product label, which sets both the rate and the volume per plant.
What is the label rate per litre?+
It's the amount of formulated product the label tells you to mix into each litre of water — for example 2 mL/L or 1 g/L. The tool multiplies your total solution volume by this rate to give the total product needed. Never exceed the label rate: more product does not cure faster and can scorch roots or breach residue limits.
When should I drench instead of spray?+
Drench when the target is in the soil or at the collar and crown — root rots, damping-off, collar rot, vine and stem-base diseases, and soil insects like grubs and root mealybugs. Foliar sprays suit leaf and shoot problems. Some systemic products are drenched so the plant takes them up through the roots and protects new growth.
How do I apply the drench correctly?+
Mix the product into the measured water, stir, and pour the per-plant volume slowly around the base so it soaks the root zone evenly. Pre-water dry soil first. Drench in the cooler part of the day, keep the volume consistent plant to plant, and avoid splashing foliage if the label warns against it. Re-treat only at the interval the label allows.
Will a drench harm the soil or roots?+
Used at the label rate it's targeted and generally safe for the crop. Over-strength solution, drenching dry or heat-stressed plants, or repeating too often can injure roots, harm beneficial soil life and leave residues. Sticking to the calculated product amount and the labelled interval keeps the treatment effective without damaging the root zone.
Does it work for pots, beds and field rows?+
Yes — the maths is the same whether you drench nursery pots, raised beds or field plants. Just count the plants and set a per-plant volume that suits their size and root spread. For large blocks, work in batches so the mixed solution is used promptly and the concentration stays even across every plant.
Are the figures precise?+
They're accurate for the volumes you enter — the calculation itself is exact. Real-world results depend on soil moisture, how evenly you pour, plant size and the product. Treat the totals as your mixing target, measure the product carefully, and follow the label for rate, volume and timing.