Using Almond Tree Fertilizer to Restore Potassium

almond tree fertilizer to prevent potassium deficiency

For every 1,000 pounds of almond kernels harvested, around 80 pounds of potassium (as K2O5) leaves the soil. This places enormous nutrient demands on the soil, year after year. Without additional nutrients, potassium deficiency can quickly affect yield and the health of the almond grove. However, many almond tree potassium fertilizer products also damage the health of the soil by leaving residual salts and chlorides while tying up nutrients. It is possible to restore potassium in the soil and even correct potassium deficiencies throughout the year using an agile almond tree fertilizer that is easy to apply.

Almond Tree Fertilizer Restoring Potassium Without Soil Damage

How Much Potassium is Available to My Almond Trees?

almond treeAlthough most soils contain large amounts of potassium, relatively small amounts of it are in a form plants can use. Consequently, growers should base management decisions on how much potassium is available when the plants need it, rather than on how much potassium is available in the soil.

Each almond orchard is a unique environment, and different soil types hold varying amounts of potassium and release it differently. This can make it tricky to manage K effectively.

“Growers who want to maximize yields need to stay on top of their K applications,” says David Doll, University of California Cooperative Extension nut pomology farm advisor for Merced County. “Otherwise, deficiencies will reduce return bloom and decrease spur longevity, which affects yields over time.”

Potassium uptake in almonds is linear, with as much as 70 to 80% of total uptake complete by mid-June. This means continuous potassium supplements will support the almond tree’s growth throughout the growing season, stimulating the growth of fruiting wood, more buds, and improved harvests. Different soil types present different challenges for maintaining potassium levels. Sandy soils and sandy loams cannot retain potassium as well as others, and require smaller, more frequent almond tree fertilizer applications. Heavier soils like clay hold on to nutrients longer, and don’t need as many applications.

Do My Almond Trees Have a Potassium Deficiency?

potassium deficiency in almonds
Leaf curling, scorching and discoloration at the margins is a sign of potassium deficiency in almonds.

Deficiencies develop gradually over time and visual symptoms can take years before they show up. Plants lacking in potassium often show delayed or stunted growth. Other deficiency signs include inward curling of leaves, discolored leaf tips and marginal scorching. When severe, potassium deficiencies can increase the loss of fruiting wood, which results in reduced crop loads.

Continued monitoring and fertilization in the orchard helps growers build and maintain K at levels where deficiencies are less of a concern. Regular soil testing can help almond growers identify nutrient trends over time. Additionally, annual leaf samples help growers keep track of K levels.

“Mid-July leaf samples work well because tissue levels are relatively stable at that time of year,” says Doll. “Take two to three leaves from five non-fruiting spurs for at least 15 to 20 trees across the block. Trees should be 100 feet apart. To maintain sufficient levels across the orchard, UC Davis recommends shooting for a target potassium level of 1.6 to 1.8 percent.

Flexible Application Methods for Almond Tree Fertilizers

irrigation system watering treesMaintaining optimal potassium levels for almonds requires almond tree fertilizer treatments at harvest and throughout the year. Almond tree fertilizers with multiple application options give growers the flexibility to accomplish this.

AgroLiquid fertilizers can be applied in many different ways. They can even be used in combination with each other or with other crop protection products, so they can be quickly and easily applied.

With the ability to mix our almond tree fertilizer with other crop protection products, you reduce the time and energy needed to feed your trees. This way, you can grow more almonds with larger size and higher quality, without adding extra tasks.

Almond Tree Fertilizer Products to Maintain Potassium and Soil Health

AgroLiquid has formulated high-efficiency liquid fertilizer for almonds to sustain the almond tree’s linear use of potassium throughout the season. Unlike other almond tree fertilizers, ours is chloride- and hydroxide-free, so it supports soil health, long-term sustainability, and won’t upset the soil’s salt index.

sure-KSure-K is a chloride- and hydroxide-free potassium fertilizer ideal for supporting orchards with high potassium requirements, like almonds. With a neutral pH, Sure-K helps to protect the health and longevity of the soil, while supplying essential potassium. It can be applied as a topdress, sidedress, foliar, or through fertigation, and it can be used with many crop protection products.

kalibrateKalibrate is similar to Sure-K, but supplies sulfur in addition to potassium. Similar to Sure-K, Kalibrate is chloride- and hydroxide-free, and it can be applied in a variety of ways. Kalibrate is ideal as an early-season potassium fertilizer to stimulate strong initial growth and production.


PRG logoPrG provides a full array of macronutrients, including nitrogen, phosphorus and potassium, as well as iron. PrG is ideal for trees that have not yet reached maturity. PrG is also ideal for stimulating growth and speeding up reproduction at the start of the season.


Let Us Design an Almond Tree Fertilizer Plan for You

The ideal AgroLiquid almond fertilizer plan is dependent on your location, climate, soil conditions, and goals with your crop. All of our fertilizer programs begin with a review of your soil samples and consultation with one of our expert agronomists. After our analysis, our team will provide you with a couple options that will help you meet your goals on a budget that won’t break the bank. Talk to an agronomist to get started.

Feeding Hungry Almonds in California (LAND OF LIQUID Blog)

So are you ready for some more almond updates?  Let me answer “Heck Yes” for you.  So I was back in CA last week and here is how the trees look now.  The blossoms are all gone.

almond trees no blossoms

The bees did their job as we see  loads of almonds growing now where there were flowers before.  And we did not see any obvious frost damage which was a big concern on an earlier visit.

almonds on trees

 Remember when Dylan held a small almond blossom pistil in his hand a few weeks ago?  Well now he’s holding the developing almond nut.  That almond is going to need some added nutrition to make it to harvest in the fall.  And that is where AgroLiquid comes in.

unripe almond

 Almond watchers SAM’s Dylan and Armando, plus Chemist Chris discuss all things almonds with the ranch manager and researcher.  Now AgroLiquid fertilizers are used in a number of commercial operations, but we wanted to design an experiment to prove the value of AgroLiquid’s different nutrient options.  Well that is the objective anyway.  I’m confident.  It’s time for some plot fertilizer application.

almond grove

This tractor is applying liquid fertilizer treatments to a plot of almond trees.  Several replicated treatments are applied in this long row of trees.

fertilizing almonds

Fertilizers are normally applied in the irrigation water, through that small sprinkler there coming out of the black water line.  To simulate fertilizer application, the fertilizer treatments are sprayed on the ground with the nozzles.  The nozzles are positioned to apply over the irrigated area.  To be realistic, the nozzles ran some earlier to wet the ground.  Then the sprayer applies the fertilizers in a high application volume of 200 gallons per acre.  This is to evenly spread the fertilizers over the zone.  Then after application,  the water is turned on again to thoroughly incorporate the treatments.  I’m convinced that this is as realistic as you can get for treatment application.  It was a beautiful day, warm and sunny.  And no wind.

almond fertilizer application

It helps that AgroLiquid fertilizers are all compatible with each other and can easily be applied all at once instead of in separate applications as is necessary with some fertilizers.  The researcher was impressed with AgroLiquid’s product compatibility.  There are a number of applications left, but that should hold them for now.  It takes well planned applications of a complete nutrient package to get best response.  So we will be following progress, and I plan to re-visit the test to keep you all posted.  There were some other interesting sights seen during the week, so stay tuned.