Fox Farm Grow Big Liquid Plant Food
- Grow big is an organic-based concentrate
- A comprehensive blend of major, minor, and micronutrients
- Great for roses, tomatoes, veggies, flowers, fruits, herbs and lawns
- Contains 6-per cent nitrogen, 4-per cent phosphorus and 4-per cent potassium
- Available in 473ML & 1 Litre
- Can be used as a foliar spray
Fox Farm Grow Big (6-4-4) is a comprehensive blend of major, minor, and micro nutrients. Formulated to promote spectacular growth, instant green-up, larger flowers, and colour intensity of blossoms. Great for roses, tomatoes, veggies, flowers, fruits, herbs, and lawns. Extra strong, a little goes a long way!
FoxFarm Grow Big delivers extra strength to grow power with micronutrients. Get your garden going with Grow Big, our fast-acting, water-soluble fertilizer for lush, vegetative, compact growth. Use Grow Big early in the season when young plants need an extra boost. We add earthworm castings and Norwegian kelp into this special brew to encourage sturdier, healthier stems and leaves, but we also provide enough nutrients and trace minerals to create the kind of healthy branching that you’ll need later in the season for more abundant buds and blooms.
Begin application of FoxFarm Grow Big within two weeks of sprouting or transplanting. Give plants a jump start with foliar feeding. When plants have reached their peak of vegetative growth and are starting to show the first signs of flowering, switch to one of FoxFarm’s extra strength blooming fertilizers.
Every Watering: 1 teaspoon per gallon
Heavy Feeding: 2-3 teaspoons per gallon every two weeks
Foliar Feeding: 1/2 teaspoon per gallon. Use a pump sprayer and apply to both sides of leaves. Early mornings are best.
Hose End Sprayer: Fill sprayer with concentrate. Do not dilute. Follow manufacturer’s instructions for recommended application rates.
Conversions: 1 Teaspoon = 5mL | 1 Tablespoon = 15 mL | 1 Ounce = 30mL | 1 Cup = 240 mL
Nutrients are the basis of any hydroponic system and since we need to meet all of the plants’ nutritional requirements, it’s important to know what you are supplying and what can go wrong. With any nutrient solution the two factors to keep in mind are firstly the composition of your nutrient – does it contain all of the elements required for plant growth in the correct ratios. And secondly, with your balanced and complete nutrient solution, what strength or ‘EC’ should it be running at for your particular crop, stage of growth and type of hydroponic system, and how do we measure this.
The nutrient solution – composition
Many growers prefer to buy a ‘pre-mixed’ nutrient solution which simply needs to be diluted (for liquid concentrates) or dissolved in water before use. Often these ‘pre-made’ nutrients come in 2, 3, 4 or even more ‘parts’ so a grower can change the ratio of the mineral elements to allow for either vegetative or fruiting growth or for different crops. There are many excellent brands of these pre-mixed nutrients on the market, however, many growers have come across major problems when they try to use some of the ‘indoor plant food’ or other nutrients which have been designed for plants growing in soil or a pre-fertilized potting mix. Often these types of products are not suitable for hydroponics because they are not designed to be a ‘complete plant food’. It is always preferable to buy a nutrient mix which is sold especially for ‘hydroponic’ use and is ‘complete’ plant food. To be ‘complete’ a hydroponic nutrient needs to have the essential elements for plant growth these are:
The levels that these elements are present in your hydroponic nutrient tend to vary between brands since there is no one single recommendation for concentrations. Many nutrients may also contain some of the ‘beneficial elements’ such as Nickel (Ni), Cobalt (Co), Silica (Si) or Selenium (Se). While these are not ‘essential’ (plants will still grow without them), they can be beneficial to many crops.
Whether you make your own nutrient solution from the different fertilizer salts or buy a pre-made brand, problems can, an often do, arise with deficiencies of one or more of the nutrient elements. Common reasons for this are that (1) the nutrient strength may be too low, resulting in insufficient nutrients for the plants in general. (2) The nutrient formula you are using may not be completely balanced, and one (or more of the elements) may be deficient. (3) Occasionally, growers may unintentionally leave out one of the fertilizer salts or the wrong fertilizer was used when the nutrient formula was weighted out. And just to complicate matters further, even if your solution is well balanced, sometimes environmental and internal plant conditions prevent the uptake of certain nutrients and deficiency symptoms then result.
Signs of Deficiency
Each of the mineral elements required by the plant has its own set of ‘deficiency signs and symptoms’ and growers can learn to identify many of these. Many of the signs are similar in appearance, but others are very distinct and most good gardening and hydroponic books will detail what these signs are. Briefly, the deficient symptoms for each of the elements are listed below (these may vary slightly between different plant species and depending on how severe the deficiency is):
Nitrogen (N): Plants are short, leaves tend to be pale green-yellow in colour, especially on the older foliage. On tomato plants, the undersides of the leaf and stems can develop a purple colouration.
Phosphorus (P): Plants are usually stunted, and a dark green colour. Symptoms occur on the older leaves first and plant maturity is often delayed. Phosphorus deficiency in some plant species can be due to conditions being too cold for uptake of this element, rather than a lack of phosphorus in the nutrient solution.
Potassium (K): The older leaves become yellowed with scattered dark (brown or black) spots, followed by tissue death. Severe deficiency will stunt the plant and all foliage will become yellowed and curled. On lettuce, the leaves may take on a yellowed, bronzed appearance starting on the older foliage.
Sulfur: Deficiency of sulfur is not common – there may be a yellowing of the leaves, first seen on the new growth.
Magnesium: Deficiency is common on tomato crops with the older leaves developing yellowed areas between the veins which stay green.
Calcium: Young leaves are affected before older leaves and become distorted, small in size with spotted or necrotic (dead) areas. Bud development is inhibited and root tips may die back. Tip burn on lettuce is a symptom of calcium deficiency but is also caused by other factors not associated with a solution deficiency. Blossom end rot of tomatoes is also caused by a deficiency of calcium within the fruit tissue (not necessary in the nutrient solution), and is more of a ‘calcium transport’ problem within the plant under certain environmental conditions.
Iron: Deficiency shows as a distinct yellowing between the leaf veins which stay green, on the new growth and younger leaves (this distinguishes it from magnesium deficiency which shows first on the older leaves). On crops such as tomatoes, iron deficiency may show when conditions are too cold for uptake, rather than be caused by an actual deficiency in solution.
Chlorine: deficiency shows as wilted leaves which then become yellowed and necrotic, eventually turning a bronze colour.Roots become stunted and thickened near the tips.
Manganese: Initially, an interveinal yellowing on the younger or older leaves, depending on the plant types. Brown, dry areas may develop and leaves may drop.
Boron: Plant size is usually reduced, the growing point may die back. Root tips often become swollen and discoloured. Leaves eventually become thickened, brittle, and may be curled with yellow spotting.
Zinc: Short plants with a reduction in internode length and leaf size. Leaf edges may be distorted or puckered, Yellowing between the leaf veins may also develop.
Copper: Deficiency is rare, but young leaves may become dark green and twisted or misshapen, often with brown, dry spots.
Molybdenum: Older leaves develop interveinal yellowing, progressing to the younger leaves. Leaf edges may develop scorching or cupping of the leaves.
Solution strength – under and overuse, measurement
Provided the nutrient you are using is complete and balanced, the concentration or strength of the solution has major effects on plant growth and development. This is why it is essential to be able to measure solution concentration, using a meaningful unit of measure. Many growers will still be working in ppm, using TDS meters, however, there is now an industry move to standardize the unit of solution measurement to EC (electrical conductivity) which is a more accurate and meaningful way to monitor your nutrient. All a TDS or ppm meter actually does is to measure the EC of the solution, then use an approximate conversion figure to convert this to PPM. The problem arises is that this conversion figure is never very accurate, as different nutrient solutions with different compositions of nutrient elements will have different PPM values so using one conversion figure can be extremely inaccurate. What the plants’ root system is actually responding to is the EC (or osmotic concentration) of the nutrient so this is what we should measure. There are a number of different EC (sometimes called CF) meters, and the ‘water resistant’ pen type meters are commonly used by growers. Depending on where in the world you are, the units expressed on your meter may be different, however, it is easy to convert between the different units of EC.
We have a wide selection of nutrients and EC meters on our site.
“It came on time, in sealed bottles, with good directions. Seems to be high quality I will be buying more FoxFarm products from GTP Hydroponics.”
“I got a few FoxFarm products. Out of the three I purchased, Bloom Big is by far my favorite. I have roses and after using Bloom Big I’ve seen as many roses as during the first flush of the summer season. I haven’t seen quite as big of a difference with Grow Big or Tiger Bloom. I actually burned some of my roses on Tiger Bloom but that might have been my fault with getting the measurements wrong.”
“ I have not used yet, but happy with other fox products so I believe we will be happy with this as well“
We Are FoxFarm Soil & Fertilizer Company
FoxFarm is passionate about producing the finest soil mixes, fertilizers, and micro-brewed liquid plant foods. Our formulas are greenhouse tested to ensure quality and consistency. FoxFarm takes great pride in delivering uncompromising quality and supreme customer service. We have supplied this consistency to our customers since 1991.
Home Grown In Humboldt County
The strength of our success and growth represents career opportunities that nurture and develop our local economy. FoxFarm proudly contributes annually to many local scholarships, community events, and local organizations. After all, Humboldt County is Our Home.
OUR COMMUNITY, OUR PRODUCTS, OUR PLANET
Our formulas are blended in small batches and rigorously tested to ensure the highest quality standards. Each of us is passionate about producing the finest handcrafted natural and organic soil mixes and fertilizers available anywhere. We do this together: Our production crew, management team, office staff, biologists, sales force, and the truck drivers who carry us to market. At FoxFarm we are dedicated to making a difference in how we treat the Earth and each other. FoxFarm products are formulated to replenish the soil, lift the human spirit and beautify the Earth, naturally. Using FoxFarm soils and fertilizers is a conscious choice to improve the environmental health of the garden; that’s good for the soil, our families and for future generations to come.