Smart plant tools

Care Calculators for Better Plant Decisions

By PlantSolve Editorial Team

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

Calculate the exact amount of compost needed to amend your garden soil. Optimize your soil health by determining the required volume based on your area, soil type, and desired application thickness.

Compost Soil Amendment

Aquarium Fertilizer Calculator

An interactive fertilizer dosage calculator for planted aquariums that accounts for tank volume, light intensity, plant load, CO2 injection, and preferred dosing method (EI, PPS-Pro, or low-tech) to generate precise macro and micro nutrient dosing schedules.

Plant Fertilizer Calculator

A precision fertilizer calculator that generates species-specific feeding schedules and dosage recommendations based on your plant type, container size, current growth stage, and local climate conditions.

Feed Schedule

Grow Bag Size Calculator

A grow bag sizing tool that matches your plant species and expected mature size to the ideal fabric bag volume, ensuring proper root development, drainage, and air pruning for healthier plants.

Plant Growth Calculator

An interactive plant growth timeline tool that predicts key milestones — germination, transplanting, first bloom, and peak maturity — based on your plant species, current date, climate zone, and care inputs.

Growth Calendar

Plant Heat Stress Calculator

A structured heat stress assessment tool that evaluates your plant's risk level based on ambient temperature, humidity, sun exposure duration, and visible symptom patterns — then outputs specific, climate-adjusted care actions for water management, shade positioning, and airflow improvement.

Heat Stress Climate

Plant Humidity Calculator

A humidity assessment calculator that compares your current indoor relative humidity against the ideal range for your specific tropical plant species, then recommends targeted improvements — humidifiers, pebble trays, misting schedules, or plant grouping strategies.

Humidity Tropical

Mulch Calculator

Calculate the exact volume and number of bags of mulch required for your garden beds. Prevent weeds, retain moisture, and protect plant roots by laying the perfect depth of mulch.

Mulch Landscaping

Neem Oil Spray Calculator

A neem oil dilution calculator that generates precise mixing ratios based on your spray bottle volume, neem oil concentration, target plant species, and infestation severity — preventing the leaf burn that results from over-concentrated applications.

Potting Mix Calculator

A soil blend calculator that generates precise potting mix ratios — combining base soil, perlite, bark, coco coir, and other amendments — tailored to your specific plant family, pot drainage, and climate conditions.

Repotting Calculator

A repotting assessment tool that evaluates your plant's current pot size, root health indicators, and growth rate to determine if repotting is needed — and recommends the optimal new container size and best soil mix for the transition.

Repot Size

Soil pH Calculator

Calculate exactly how much lime or sulphur you need to adjust your garden's soil pH. Correcting your soil pH ensures plants can properly absorb the nutrients they need.

Soil Health pH

Sowing Calendar

An essential planting calendar for vegetable and herb gardeners. Find exact indoor and outdoor seed-sowing dates tailored to your USDA Hardiness Zone to avoid frost and maximize your harvest.

Plant Light Calculator

A light placement tool that matches your plant's specific light needs against your available window directions and seasonal sunlight hours — recommending the optimal room position and supplemental lighting options if natural light is insufficient.

Light Placement

Recommended next actions

Use Results in Real Care Workflows

After running a calculator, open matching plant guides and focused journal articles for practical next steps.

Calculator

Aquarium Fertilizer Calculator: Macro & Micro Doses

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

Calculator

Compost Calculator: How Much Do You Need?

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).

Calculator

Grow Bag Size Calculator: Find the Right Bag for Every Plant

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

Plant Guide

African Milk Tree Care: Watering & Toxic Sap Guide

The African Milk Tree is a towering, architectural succulent that looks like a cactus but behaves entirely differently. It is famous for its extreme drought tolerance and its highly toxic white sap.

Plant Guide

African Violet Care: Bottom Watering & Bloom Tips

African Violets are classic indoor bloomers, but their fuzzy leaves demand a unique watering approach. We break down the 'bottom-watering' technique essential for preventing crown rot and triggering year-round flowers.

Plant Guide

Alocasia Amazonica Care: Fix Yellow Leaves & Dormancy

The Alocasia Amazonica (African Mask Plant) is a stunning but demanding houseplant. It requires high humidity, warmth, and careful watering to prevent root rot and leaf drop.