Smart plant tools

Care Calculators for Better Plant Decisions

Use lightweight calculators for watering, fertilizer dosage, potting mix, sunlight, humidity, growth planning, and seasonal plant care.

Tools
15
Inputs
Labeled
Result
Instant

Recommended first

Plant Watering Calculator

Calculate the correct watering frequency for your plant based on species, pot size, soil type, season, and climate.

Open calculator

All Plant Care Calculators

Compost Calculator

Get the perfect compost volume for your garden in seconds. No more excess bags or weak amendments – tailored for your soil type (sand, clay, loam).

Compost Soil Amendment

Plant Fertilizer Calculator

Calculate the exact fertilizer dose and feeding schedule for your plant based on species, pot size, growth stage, and season.

Feed Schedule

Aquarium Fertilizer Calculator

Calculate exact macro and micro fertilizer doses for your planted aquarium based on tank volume, plant density, CO2 system, and dosing strategy.

Grow Bag Size Calculator

Find the perfect grow bag size for your plant based on root depth, plant type, and expected mature size.

Plant Growth Calculator

Predict your plant's growth milestones and generate a personalized care calendar based on species, climate, and current conditions.

Growth Calendar

Plant Heat Stress Calculator

Diagnose plant heat stress risk from your temperature, humidity, sunlight exposure, and symptoms — then get specific watering, shade, and airflow actions.

Heat Stress Climate

Plant Humidity Calculator

Assess your home's current humidity and get specific improvement recommendations for tropical houseplants like Calatheas, Orchids, and Ferns.

Humidity Tropical

Mulch Calculator

Know exactly how many bags or cubic yards of mulch to buy. Save money and time with precise calculations for any garden shape.

Mulch Landscaping

Neem Oil Spray Calculator

Calculate the correct neem oil dilution ratio for your spray bottle size, plant type, and pest severity — safely and without burning leaves.

Potting Mix Calculator

Calculate the ideal potting mix ratios for any plant type — from moisture-loving tropicals to drought-tolerant succulents.

Repotting Calculator

Find out if your plant needs repotting now and get the correct new pot size based on species, current pot size, and root health indicators.

Repot Size

Soil pH Calculator

Know exactly how much lime or elemental sulphur you need to reach your target soil pH. No more over‑application or wasted amendments.

Soil Health pH

Sowing Calendar

Find the best indoor and outdoor sowing dates for vegetables, herbs, and flowers based on your USDA Hardiness Zone and local frost dates.

Plant Light Calculator

Determine the ideal indoor light placement for your plant based on species, window direction, and seasonal light availability.

Light Placement