What is Professor’s Nutrients Flower Boost and what does it do?
Flower Boost is a concentrated PK additive designed to enhance early flower development. It increases phosphorus and potassium levels to promote more bud sites, stronger flower structure, and denser blooms during the first half of the flowering cycle.
When should I start and stop using Flower Boost?
Begin using Flower Boost at the onset of flowering—either when you flip to bloom lighting or see the first flower set. It’s typically used through early-to-mid flower, then swapped for a stronger finisher like Extreme Boost in the final three weeks.
How much Flower Boost should I use in hydro, coco, or soil?
Use 2 mL/L in hydro or coco, and 1.5 mL/L in soil. If unsure, start at 50–75% strength and increase as plants respond. Monitor EC and plant health to avoid overfeeding, especially in sensitive strains or hot environments.
Does Flower Boost affect pH or EC?
Yes—it increases EC and may shift pH slightly depending on your water and nutrient mix. Always mix everything first, then check and adjust pH at the end. Don’t guess—measure your final tank before feeding.
What’s the best way to mix Flower Boost?
Mix order: water first → base nutrients → mix well → Flower Boost → mix again → pH last. Never mix concentrates together directly. Add each product to water one at a time and stir thoroughly between additions.
Can I use Flower Boost with other nutrients or additives?
Yes—it works with most base nutrients, Cal-Mag, silica, enzymes, and amino acids. Avoid stacking with other PK boosters or using it alongside Extreme Boost. Keep your total EC within range to prevent burn or lockout.
Is Flower Boost compatible with all grow systems?
Yes—Flower Boost works in hydro, DWC, coco, soil, and drain-to-waste systems. It generally doesn’t clog drippers if mixed properly. In drip systems, a line cleaner can help keep emitters flowing smoothly.
Can Flower Boost improve bud size, density, or yield?
That’s the goal. When used correctly in a healthy grow environment, Flower Boost helps trigger more bud sites and denser flowers. It can support higher yields, but lighting, genetics, and overall plant health still play the biggest roles.
What are signs I’m overfeeding Flower Boost?
Symptoms include tip burn, crispy leaf edges, stalled drinking, or clawing. You may also see calcium deficiency if PK levels are too high. If issues appear, back off the dose, lower EC, and reset with a light flush if needed.
Can Flower Boost cause nutrient lockout?
Yes—excessive PK can throw off nutrient balance and lead to lockout, especially if EC is too high or pH is unstable. Monitor your mix closely and don’t stack multiple bloom boosters.
Can I use Flower Boost with hard or RO water?
Yes. In hard water, reduce base feed to avoid pushing EC too high. In RO setups, ensure your nutrient program includes enough calcium and magnesium, as Flower Boost doesn’t provide those elements.
Can Flower Boost be foliar sprayed?
No—it’s designed for root-zone feeding only. Foliar spraying PK boosters can damage leaves or cause spotting. Always dilute Flower Boost into your nutrient solution and feed via the root zone.
Is Flower Boost organic?
The standard version is a mineral-based PK additive. If you're growing organically, look for a certified organic version and follow its label guidelines to stay compliant with organic systems.
Should I shake and store Flower Boost a certain way?
Yes—shake well before each use. Store sealed in a cool, dark place away from heat and direct sunlight. Don’t freeze the bottle or leave it exposed in hot environments like garden sheds.
What sizes does Flower Boost come in?
Professor’s Nutrients Flower Boost is available in 1L, 5L, 10L, and 20L sizes, depending on the supplier. Choose based on your grow size and frequency—larger bottles offer better value for ongoing flower cycles.
