Grubby cup

Grubbycup has been an avid indoor gardener for more than 20 years. His articles were first published in the United Kingdom, and since then his gardening advice has been published in French, Spanish, Italian, Polish, Czechoslovakian and German.

Articles by Grubby cup


Aquaponics Aquaponics Aquaponics Aquaponics


If you want to create an aquaponic system, it’s important to keep in mind how you’re going to balance the nitrogen levels. Denitrification...

Nutrient Solution Nutrient Solution Nutrient Solution Nutrient Solution


With so many different nutrient lines to choose from, Grubbycup gives us an idea of how.

Plant Starts Plant Starts Plant Starts Plant Starts


There are many benefits to using starts, but there are a few things to keep in mind to ensure your garden thrives a few months or years...

How to Make Seed Starters from Your Bathroom's Loofah How to Make Seed Starters from Your Bathroom's Loofah How to Make Seed Starters from Your Bathroom's Loofah How to Make Seed Starters from Your Bathroom's Loofah


Luffa sponges, which are the dried fruit of a vining plant, are more than the ultimate body scrubber in your bathroom. You can also use...

Manipulating Flowering in the Grow Room Using Photoperiods Manipulating Flowering in the Grow Room Using Photoperiods Manipulating Flowering in the Grow Room Using Photoperiods Manipulating Flowering in the Grow Room Using Photoperiods


Plants that use the duration of their dark periods to signal flowering are said to be subject to photoperiodism and are classified as...

How a Fungal Outbreak Can Destroy an Entire Plant Cycle How a Fungal Outbreak Can Destroy an Entire Plant Cycle How a Fungal Outbreak Can Destroy an Entire Plant Cycle How a Fungal Outbreak Can Destroy an Entire Plant Cycle


Fungus spores are ubiquitous. For the average person, this is meaningless, unless it is allergy season or black mold is found in a dwelling...

A Garden Doesn't Always Have to be Perfect! A Garden Doesn't Always Have to be Perfect! A Garden Doesn't Always Have to be Perfect! A Garden Doesn't Always Have to be Perfect!


In a world full of competition, even gardening can become a burden. It doesn’t have to be that way. Biggest and best isn’t necessary, as...

7 Ways to Boost the Bloom in Your Grow Room 7 Ways to Boost the Bloom in Your Grow Room 7 Ways to Boost the Bloom in Your Grow Room 7 Ways to Boost the Bloom in Your Grow Room


One of the most satisfying moments for any grower is nurturing flowering crops into producing abundant, vigorous blossoms, which then lead...

9 Creative Places to Start Your Next Garden 9 Creative Places to Start Your Next Garden 9 Creative Places to Start Your Next Garden 9 Creative Places to Start Your Next Garden


Gardens need not be confined to the backyard. Here are some other potential places to start a garden this spring.

How Enzymes Work How Enzymes Work How Enzymes Work How Enzymes Work


Enzymes are organic substances produced by beneficial microbes that are becoming a common ingredient in plant supplements found at the grow...

Same Plant, Different Pots Same Plant, Different Pots Same Plant, Different Pots Same Plant, Different Pots


Plants that share the same DNA can be produced, creating on-demand identical twins (almost).

The Art of Growing Up! The Art of Growing Up! The Art of Growing Up! The Art of Growing Up!


Want vertical interest? Color? Elegance? Whimsy? Vines have it all! They shimmy up poles and curlicue around strings. They twist and turn...

10 Tips For Gardening in Grow Tents 10 Tips For Gardening in Grow Tents 10 Tips For Gardening in Grow Tents 10 Tips For Gardening in Grow Tents


A grow tent is a handy piece of equipment that can turn any kind of indoor space into a garden.

10 Helpful Post-Harvest Hints 10 Helpful Post-Harvest Hints 10 Helpful Post-Harvest Hints 10 Helpful Post-Harvest Hints


There is nothing more rewarding than bringing in the fruits of your hard labor.

pHiguring Out pH pHiguring Out pH pHiguring Out pH pHiguring Out pH


If the only thing that comes to mind when you see the letters P and H next to each other is that colored chart from high school, read on...

Debunking Common Gardening Myths: Separating Fact from Fiction Debunking Common Gardening Myths: Separating Fact from Fiction Debunking Common Gardening Myths: Separating Fact from Fiction Debunking Common Gardening Myths: Separating Fact from Fiction


A lot of the advice growers receive is based either on sound science, or a friend or relative’s proven practices, but some things can...

Common Nutrient Additives Common Nutrient Additives Common Nutrient Additives Common Nutrient Additives


When it comes to nutrient additives, there are a lot of options available for growers. But, as Grubbycup explains, it is important to know...

Sourcing CO2 for Your Indoor Garden Sourcing CO2 for Your Indoor Garden Sourcing CO2 for Your Indoor Garden Sourcing CO2 for Your Indoor Garden


As an essential piece of the photosynthesis puzzle, carbon dioxide is an important component of indoor gardening that can be supplemented...

A Plant's Circle of Life A Plant's Circle of Life A Plant's Circle of Life A Plant's Circle of Life


A basic knowledge of the different stages of growth and development plants go through can help growers know what to expect from their...

Growing 101: Nutrient Solution Management Growing 101: Nutrient Solution Management Growing 101: Nutrient Solution Management Growing 101: Nutrient Solution Management


There are certain nutrients that plants crave the most. Grubbycup explains how to mix them up to create nutrient solutions your plants will...

Growing 101: Basic Plant Nutrition Growing 101: Basic Plant Nutrition Growing 101: Basic Plant Nutrition Growing 101: Basic Plant Nutrition


Just like humans, plants need food to survive and thrive. Here’s a quick guide to get you started on designing your first nutrient regimen.

Growing 101: The Basics of Plant Lighting Growing 101: The Basics of Plant Lighting Growing 101: The Basics of Plant Lighting Growing 101: The Basics of Plant Lighting


At the start of your new indoor garden journey, you selected what you'll grow, where you'll grow it and what you'll use to grow it in. Now...

Growing 101: Perfect Potting Mixes Growing 101: Perfect Potting Mixes Growing 101: Perfect Potting Mixes Growing 101: Perfect Potting Mixes


Starting with a good potting mix can make a big difference in how well a container garden performs. Grubbycup shares the basics on what to...

Growing 101: Choosing a Hydroponic System Growing 101: Choosing a Hydroponic System Growing 101: Choosing a Hydroponic System Growing 101: Choosing a Hydroponic System


So, you’ve decided to give hydroponic gardening a try. Now what? First of all, you need to decide which hydroponic system to use.

Gardening 101: A Back-to-Basics Primer for Growing Gardening 101: A Back-to-Basics Primer for Growing Gardening 101: A Back-to-Basics Primer for Growing Gardening 101: A Back-to-Basics Primer for Growing


All gardeners start out the same way—not knowing how to garden, and then learning. Here is the first in a series of articles written for...

The Vascular System of Flowering Plants The Vascular System of Flowering Plants The Vascular System of Flowering Plants The Vascular System of Flowering Plants


Being acquainted with the basics of a flowering plant’s vascular system can help gardeners understand how a plant takes up nutrients and...

Seeds and Meristems Seeds and Meristems Seeds and Meristems Seeds and Meristems


Seeds are amazing storage containers that allow a plant to travel through space and time. Inside each protective casing is a tiny plant...

Photosynthesis, Photoperiodism and Prolonging the Season Photosynthesis, Photoperiodism and Prolonging the Season Photosynthesis, Photoperiodism and Prolonging the Season Photosynthesis, Photoperiodism and Prolonging the Season


Manipulating the light that plants are exposed to can allow gardeners to grow plants out of sync with their normal growing seasons.

Understanding Genetically Modified Organisms Understanding Genetically Modified Organisms Understanding Genetically Modified Organisms Understanding Genetically Modified Organisms


The debate over whether genetically engineered crops should be allowed in the human food supply continues. Grubbycup shares some positives...

pH pHacts pH pHacts pH pHacts pH pHacts


Do you know what pH stands for? Read on to find out and to learn other fun facts about pH.

Holla for Ollas Holla for Ollas Holla for Ollas Holla for Ollas


Spanish for pot, ollas have been used for thousands of years in many places around the world as a simple, yet incredibly effective...

The Dirt on Soil & Potting Mixes The Dirt on Soil & Potting Mixes The Dirt on Soil & Potting Mixes The Dirt on Soil & Potting Mixes


Ever question what was really in your soil or potting mixes, and how it affects your growing? Well, here's the dirt on your dirt.

A Different Kind of Fertilizer: an Introduction to Biosolids A Different Kind of Fertilizer: an Introduction to Biosolids A Different Kind of Fertilizer: an Introduction to Biosolids A Different Kind of Fertilizer: an Introduction to Biosolids


Although biosolids are banned for agricultural use in many areas of the United States, the subject deserves a closer look.

10 Tips Toward a Super Spring Start 10 Tips Toward a Super Spring Start 10 Tips Toward a Super Spring Start 10 Tips Toward a Super Spring Start


Spring planting marks the beginning of the outdoor gardening season, and getting off to a good start can go a long way toward a successful...

Decoding Nutrient Solutions Decoding Nutrient Solutions Decoding Nutrient Solutions Decoding Nutrient Solutions


Often, plants require nutrient elements in quantities so minute that we need to look at them in parts per hundred and parts per million.

The Fungus Among Us The Fungus Among Us The Fungus Among Us The Fungus Among Us


What do molds, mildews, mushrooms, yeasts and mycorrhizae all have in common? Well, they are all forms of fungus, of course!

Mud Pies and Hair Hygrometers: DIY Projects for Indoor Gardening Mud Pies and Hair Hygrometers: DIY Projects for Indoor Gardening Mud Pies and Hair Hygrometers: DIY Projects for Indoor Gardening Mud Pies and Hair Hygrometers: DIY Projects for Indoor Gardening


Sprouting seeds is a common part of gardening and, with a little ingenuity, can be an opportunity to explore a gardener's DIY side, both...

Gardening for Geeks: By the Numbers Gardening for Geeks: By the Numbers Gardening for Geeks: By the Numbers Gardening for Geeks: By the Numbers


Some gardeners are very artistic in their approach to gardening, in that they are content to estimate and remember which years had good...

Reuse, Reuse, Reuse Your Media Reuse, Reuse, Reuse Your Media Reuse, Reuse, Reuse Your Media Reuse, Reuse, Reuse Your Media


During harvest time, there is first the joy of collecting the fruits of your labor, and then starts the somewhat less entertaining chore of...

Photons: The Secret to Light Speed Growth Photons: The Secret to Light Speed Growth Photons: The Secret to Light Speed Growth Photons: The Secret to Light Speed Growth


Plants cannot grow without light, and the amount of light reaching your plants greatly affects how well they grow. Here, Grubbycup takes...

Start Your Plant’s Day Right: Organic and Chemical Nutrients Start Your Plant’s Day Right: Organic and Chemical Nutrients Start Your Plant’s Day Right: Organic and Chemical Nutrients Start Your Plant’s Day Right: Organic and Chemical Nutrients


A plant needs elemental nitrogen, phosphorus, and potassium for healthy growth, but where it gets these nutrients presents growers with a...

What Every Grower Needs to Know About Water Quality What Every Grower Needs to Know About Water Quality What Every Grower Needs to Know About Water Quality What Every Grower Needs to Know About Water Quality


Water. It’s a basic requirement for all life on our planet and absolutely essential to every aspect of gardening—both indoors and out—but...

Cloches to Greenhouses Cloches to Greenhouses Cloches to Greenhouses Cloches to Greenhouses


Cloches, hothouses, cold frames, greenhouses—what’s the difference? Grubbycup explains how all these garden structures can help you to...

Backyard Composting Made Easy Backyard Composting Made Easy Backyard Composting Made Easy Backyard Composting Made Easy


If you took a bag containing leaves, lawn clippings and ripped up newspapers and spread it out on the ground, eventually it would decompose...

It Starts With A Seed It Starts With A Seed It Starts With A Seed It Starts With A Seed


Many garden plants start out as seeds. You could look at these tiny plants wrapped in hard shells as presents waiting for spring to unwrap...

Top Growing Media Options for Containers Top Growing Media Options for Containers Top Growing Media Options for Containers Top Growing Media Options for Containers


The two most common types of growing media used for containers are potting soils and hydroponic media, but there are plenty of alternatives.

Q&A by Grubby cup


How can I reduce the cost of starting an indoor garden? How can I reduce the cost of starting an indoor garden? How can I reduce the cost of starting an indoor garden? How can I reduce the cost of starting an indoor garden?


Thank you for your question, Nick. Most of your indoor gardening costs should come from a combination of environmental conditioning and...

What advice do you have when switching from dirt to coco coir? What advice do you have when switching from dirt to coco coir? What advice do you have when switching from dirt to coco coir? What advice do you have when switching from dirt to coco coir?


There are several grow media options out there gardeners can choose from, each with their strengths and weaknesses. Dirt, soilless mixes...

I would like to use pre-buffered coco. What is a well-buffered coco? I would like to use pre-buffered coco. What is a well-buffered coco? I would like to use pre-buffered coco. What is a well-buffered coco? I would like to use pre-buffered coco. What is a well-buffered coco?


Coco coir is known for having good cation exchange capacity (CEC). This is basically a measure of negatively charged sites in the medium...

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