Emerald Triangle Crystal Burst

Emerald Triangle Crystal Burst is a concentrated 0-15-15 liquid PK booster engineered for the flowering stage. Branded as one of the most potent liquid bloom boosters on the market, the formula is designed to drive bud mass, density, and resinous oil production in flowering culinary and medicinal herbs. A measured dose of vitamin B1 (thiamine) is included to help relieve plant stress caused by aggressive bloom feeding regimens.

Crystal Burst is the liquid flagship of Emerald Triangle’s Humboldt County’s Own product line, a nutrient family developed in Northern California’s Emerald Triangle by cultivators familiar with high-performance flower production. The formula sits in the Nutrients & Additives > Additives > Growth & Bloom Boosters category and is positioned by the brand as roughly 50% stronger than the most popular comparable bloom booster at the same price point. The 1-gallon size described on this page ships from Cultivate Supply with a unit weight of about 11.16 lb and an effective shelf price of $70.20 retail.

Because Crystal Burst is concentrated, the working dose is small: 1 teaspoon (5 ml) per gallon of feed water, beginning at the first signs of flower development (around week 2 of bloom) and continuing through roughly one week before harvest. The product is compatible with both soil and hydroponic systems and is formulated to work alongside any base nutrient line — it is intended as a stand-alone PK supplement layered on top of an existing grow/bloom program rather than as a full feed.

Emerald Triangle Crystal Burst Specifications

Crystal Burst is sold as a liquid concentrate in four pack sizes. The 1-gallon SKU (ETBURSTG) is the most commonly stocked size for serious home and commercial growers. The table below summarizes the key specifications for the 1-gallon unit; smaller and larger sizes share the same formulation and dose rate.

Specification	Value
Brand / line	Emerald Triangle (Humboldt County’s Own)
SKU (1 gal)	ETBURSTG
Guaranteed NPK analysis	0-15-15
Formulation type	Inorganic-based liquid PK / bloom booster
Primary nutrients	Phosphorus (P) and potassium (K), with vitamin B1 (thiamine)
Available sizes	1 quart, 1 gallon, 2.5 gallon, 5 gallon
Unit weight (1 gal)	11.16 lb
Application rate	1 teaspoon (5 ml) per gallon of water
Application window	From first signs of flower (approx. week 2 of bloom) through approx. 1 week before harvest
System compatibility	Soil and hydroponic
Nutrient line compatibility	Works with all base nutrient lines
Category path	Nutrients & Additives > Additives > Growth & Bloom Boosters

Why Choose Emerald Triangle Crystal Burst

Crystal Burst exists for one job: deliver concentrated phosphorus and potassium during flowering without disrupting the rest of the feeding program. The brand’s own marketing leans on potency and value rather than novelty, and that positioning is reflected in the formulation itself. If you are weighing whether Crystal Burst belongs in your bloom-stage line-up, the points below cover the practical differentiators a grower actually cares about.

• Concentrated 0-15-15 analysis. The PK numbers are higher than many liquid bloom boosters at the same price tier, which is what allows the 1 teaspoon per gallon dose rate. A lower volume of product covers the same reservoir, which matters for both cost-per-feed and storage footprint.
• Vitamin B1 (thiamine) on board. Thiamine is included specifically to relieve stress caused by high-performance bloom regimens. When you push P and K hard during flower, plants can show stress symptoms; the B1 inclusion is the brand’s way of building in a buffer rather than asking the grower to add a separate B-vitamin product.
• Compatible with any base nutrient line. Crystal Burst is designed as an additive, not a base. That makes it straightforward to layer onto General Hydroponics, Advanced Nutrients, Athena, House & Garden, or any other base feed program already in your reservoir.
• Soil and hydroponic compatibility. The same product and the same dose rate apply whether you run in coco, peat, rockwool, deep water culture, drip-to-waste, or living soil. That reduces SKU sprawl for growers who run mixed-media facilities.
• Direct competitor positioning. The brand pitches Crystal Burst as roughly 50% stronger than the most popular comparable liquid bloom booster at the same price point. Growers cross-shopping the major PK boosters can use that as a starting yardstick, then compare guaranteed analysis numbers on the labels side-by-side.
• Humboldt County provenance. The Emerald Triangle / Humboldt County’s Own line is developed by cultivators in Northern California’s commercial cannabis-growing region. The formula reflects field-tested feeding behavior rather than a strictly laboratory-derived ratio.

Best Uses for Emerald Triangle Crystal Burst

Crystal Burst is a bloom-window additive, not a vegetative feed and not a stand-alone nutrient program. The use cases below cover the scenarios where the formula earns its place on the shelf. In each scenario, Crystal Burst layers onto whatever base nutrient line you already use; it does not replace base A/B feed.

• Mid- to late-flower PK push in indoor flowering rooms. The classic use case. Starting around week 2 of bloom, add 1 tsp per gallon to the reservoir and continue through the back half of flower. The 0-15-15 analysis loads the plant with the phosphorus and potassium it needs to size and finish flowers.
• Greenhouse and light-deprivation flower cycles. The same dosing logic applies in greenhouses running short-day cycles. Crystal Burst’s compatibility with both soil and hydroponic systems means a single SKU works across mixed greenhouse setups using soilless mix or drip-to-waste coco.
• Hydroponic recirculating reservoirs. In DWC, NFT, ebb-and-flow, or recirculating drip systems, the liquid concentrate dissolves cleanly into reservoir water and travels with the base feed. There is no powder to pre-dissolve and no settling concerns when dosed at label rate.
• Coco coir and peat-based drain-to-waste. Crystal Burst’s PK boost pairs well with coco’s typical bloom feed pattern, where growers often add an extra P/K supplement starting at flower transition.
• Side-by-side trials against another PK booster. Growers running A/B tests against General Hydroponics Kool Bloom or another major PK product can drop Crystal Burst into one room (or one bench) at label rate to evaluate yield and resin response on their own genetics.
• Programs already using complementary additives. Crystal Burst layers cleanly with root inoculants, beneficial-microbe products, and organic finishers. If you already run something like Heavy 16 Roots for root development in veg and early flower, Crystal Burst slots into the mid-flower window without conflict.

Emerald Triangle Crystal Burst vs General Hydroponics Kool Bloom

General Hydroponics Kool Bloom (liquid) is the comparison the brand itself draws — Crystal Burst is positioned as the higher-potency alternative at the same price point. Kool Bloom is the most widely stocked liquid PK booster in the hydroponic retail channel, which is exactly why Emerald Triangle pegs its potency claim to that benchmark. The headline difference is concentration: Crystal Burst’s 0-15-15 analysis carries more P and K per ounce of product than most comparable liquid PK boosters in the same price tier, which is how the brand arrives at its "50% stronger" claim.

Practically, that means a smaller working dose accomplishes the same reservoir-level PK load. Both products are designed to layer on top of a base nutrient line during the flowering window, both are pH-friendly when used at label rate, and both are compatible with soil and hydroponic systems. Where Crystal Burst differentiates is the inclusion of vitamin B1 (thiamine) in the formulation — a stress-relief inclusion that Kool Bloom does not advertise. If you already run a separate B-vitamin product, that distinction is less meaningful; if you don’t, Crystal Burst bundles the stress-buffer into a single bottle.

For growers cross-shopping against organic or microbial finishers rather than another mineral PK, the comparison shifts. A product like PureCrop1 sits in a different category (whole-plant biostimulant rather than a PK-only additive) and would be layered with Crystal Burst, not swapped for it. Within the PK booster category specifically, Crystal Burst’s closest in-house comparison is Emerald Triangle Sonic Bloom, which is the dry-powder version of the same idea. The brand explicitly notes that growers should run Crystal Burst or Sonic Bloom, not both at once — pick the format (liquid vs. dry) that fits your reservoir and dosing workflow.

Compatibility & Operating Range

Crystal Burst is formulated to play nicely with the broader bloom-stage ecosystem. The brand’s compatibility statement is short and unambiguous: works with all nutrient lines, soil and hydroponic. The notes below expand on what that means in practice for the most common grow scenarios.

• Base nutrient lines. Compatible with any base A/B feed program — General Hydroponics, Advanced Nutrients, House & Garden, Athena, Cutting Edge Solutions, Heavy 16, Botanicare, Canna, Jack’s, MegaCrop, or any equivalent. Crystal Burst is the PK supplement, not the base.
• Growing media. Coco coir, peat-based potting mixes, rockwool, expanded clay (LECA), perlite, and living soil are all in scope. The product is also suited to deep water culture and other water-only hydroponic methods.
• Reservoir pH window. Crystal Burst is designed to be used after the base nutrient solution has been pH-adjusted to a typical 5.8–6.2 reservoir target for soilless / hydroponic, or 6.2–6.8 for soil. The brand notes the product helps prevent pH imbalances and nutrient lockout when used at label rate.
• Reservoir temperature. Standard hydroponic reservoir temperature ranges (roughly 65–72°F / 18–22°C) are appropriate. The product is a liquid concentrate; avoid storing at freezing temperatures or in direct sunlight.
• Mutually exclusive with Sonic Bloom. Per Emerald Triangle’s published guidance, do not run Crystal Burst and Sonic Bloom in the same feed window. Choose one based on your preferred dosing format (liquid vs. dry powder).
• Complementary additives. Layers cleanly with root inoculants and beneficial-microbe products such as Advanced Nutrients Tarantula, with organic amendments like Down To Earth Crab Meal used in soil-based programs, and with carbohydrate / molasses-based finishers like Earth Juice Hi-Brix Molasses.
• Storage. Keep the cap tightly closed when not in use. Store in a cool, dry location out of direct sunlight to preserve the active concentration.

Dosing Guidelines

Crystal Burst is dosed on a simple per-gallon teaspoon basis. The brand’s published rate is 1 teaspoon (5 ml) per gallon of feed water, applied throughout the flowering window. The table below restates the rate and timing for the most common reservoir sizes; for very large commercial reservoirs scale linearly from the per-gallon rate.

Reservoir / batch size	Crystal Burst dose (label rate)
1 gallon (3.8 L)	1 tsp (5 ml)
5 gallons (19 L)	5 tsp (25 ml) — about 1 fl oz + 2 tsp
10 gallons (38 L)	10 tsp (50 ml) — about 3 fl oz + 1 tsp
25 gallons (95 L)	25 tsp (125 ml) — about 4 fl oz
50 gallons (190 L)	50 tsp (250 ml) — about 8.5 fl oz
100 gallons (380 L)	100 tsp (500 ml) — about 17 fl oz

When to start: Begin dosing at the first signs of flower development — typically around week 2 of the bloom (12/12) photoperiod for indoor flowering plants, or at flower-stretch transition in greenhouse cycles. When to stop: Continue dosing through bloom and taper out roughly one week before harvest to allow the plant to use up reservoir reserves and to support a clean flush window if your program calls for one.

Frequency: Apply at every bloom-stage reservoir change or feeding, not as a one-time shock dose. Crystal Burst is a continuous-feed additive, not a stress event. Do not exceed label rate: Higher dose rates do not produce a proportional yield benefit and can push EC above the plant’s working range. If you observe nutrient burn (tip burn, marginal leaf curl, dark interveinal color), reduce dose by 25% and recheck runoff EC before resuming label rate.

Stack rules: Run Crystal Burst or Sonic Bloom — not both. You can run Crystal Burst alongside root inoculants, microbial products, carbohydrate finishers, calcium / magnesium supplements, and silica products. Always add silica to the reservoir first (before pH adjustment) if your base program uses one.

How to Mix & Apply

Crystal Burst is a liquid concentrate, so the workflow is straightforward: shake, measure, add to water, mix, verify, feed. The numbered steps below describe the recommended sequence for a typical hydroponic or coco reservoir; soil growers can follow the same logic and pour the finished feed at the base of the plant.

1. Shake the bottle thoroughly. Crystal Burst is a concentrate; agitation before measuring ensures a uniform draw and consistent NPK delivery from feed to feed.
2. Fill the reservoir with the target volume of source water. Use RO, dechlorinated tap, or rainwater per your normal program. Start with water close to your target temperature (65–72°F / 18–22°C).
3. Add your base nutrients first. Mix in your base A/B feed and any silica according to your nutrient line’s published order of operations. Crystal Burst is added as a supplement on top of the base feed, not in place of it.
4. Add any other additives next. Calcium/magnesium supplements, beneficial-microbe inoculants, and root products should be added per their own label instructions before Crystal Burst.
5. Measure 1 teaspoon (5 ml) of Crystal Burst per gallon of finished feed. Use a calibrated measuring syringe, dosing cup, or measuring spoon. For larger reservoirs, scale linearly using the dosing table above.
6. Pour the measured Crystal Burst into the reservoir and stir or recirculate. Allow the reservoir pump or a stir paddle to fully homogenize the solution for 1–2 minutes.
7. Adjust pH after all nutrients and additives are in. Target 5.8–6.2 for hydroponic and soilless systems; 6.2–6.8 for soil. Re-check EC against your target for the current bloom week.
8. Feed at your normal schedule. Crystal Burst-amended feed is used the same way as your base feed — irrigation lines, hand-watering, or recirculating loop. There are no special application steps.
9. Repeat at every bloom-stage feed. Continue dosing throughout flower until roughly one week before harvest, at which point taper off in line with your finish/flush program.
10. Observe and adjust. Monitor runoff EC, leaf colour, and bud development. Healthy bloom-stage plants on Crystal Burst should show steady flower swell and resin development through the back half of bloom. If readings drift outside your target range, reduce dose by 25% and recheck.

Sources & Further Reading