Garden Blog - Top Tropicals

Date: 7 Mar 2026

🌞 Spring Nutrition Strategy: How to Identify and Fix Plant Nutrient Starvation

Smokey and Sunshine PeopleCats diagnose a starving coffee plant and
revive it using Sunshine Robusta boosters, turning a weak yellow plant into
a healthy green coffee tree after one month..

Sunshine: I'm trying to fight rising coffee prices. So I planted my own coffee plant. But it's dying.

Smokey: It's not dying. It's starving. Classic nutrient collapse. Imagine going two days without donuts.

Sunshine: Two days? That's a PeopleCats rights violation. Catstitution First Amendment: food, including donuts, must remain available.

Smokey: Exactly. Plants feel the same. Let's feed it. Sunshine Robusta. Robusta is coffee, you know.

Sunshine: Obviously they named Sunshine Boosters after my charm. And since it's coffee, it should work perfectly.

One month later

Sunshine: Holy whiskers! You're a magician.

Smokey: No magic. Just boosters.

Sunshine: Great. Coffee is on me when this tree starts producing. You bring the donuts.

Read more about Smokey & Sunshine

Fellow gardeners,

Spring has arrived, and plants are coming back to life. New shoots are appearing, fresh leaves are unfolding, and roots are beginning to grow actively again. As plants enter this important stage of the season, they need more than just water to support their growth. Proper nutrition is essential for strong development and healthy plants. SUNSHINE Boosters provide the balanced nutrition plants need to start the growing season strong.

A simple rule we follow in our nursery: new growth responds best to foliar feeding. When nutrients are sprayed directly on the leaves, plants can absorb them quickly and efficiently.

Immediate action – nutrients are absorbed through the leaves and start working right away.
No delay traveling through soil – plants do not need to wait for nutrients to move down to the roots.
Avoids soil lockout – micronutrients can become unavailable in high pH soils, but foliar feeding bypasses this problem.
Supports stressed plants – when roots are cold, damaged, or newly transplanted, foliar feeding helps plants recover faster.

However, sometimes plants begin to show visible nutrient deficiencies. Yellow leaves, slow growth, brown leaf edges, or distorted new leaves are often early signs that the plant is missing essential elements needed for healthy development.

Piper sarmentosum - Vietnamese Pepper - with fertilizer (left) and without (right)

These symptoms are especially common in container plants, where nutrients can be quickly depleted or become unavailable due to soil pH and watering conditions.

Use the quick reference table below to identify common nutrient-related symptoms and the recommended SUNSHINE solution to correct them.

Symptom you see	What to do
Pale leaves, slow growth, weak new shoots (often nitrogen related)	Spray SUNSHINE Robusta to stimulate strong vegetative growth.
Brown leaf edges or weak plant vigor (often potassium related)	Apply SUNSHINE Robusta to restore nutrient balance.
Yellow leaves with green veins (iron or manganese deficiency)	Apply SUNSHINE Superfood to correct micronutrient deficiency.
Small distorted leaves or poor flowering (zinc or boron deficiency)	Use SUNSHINE Superfood during active growth period.

🌿Foliar Feeding: How Much and How Often

For most plants, foliar feeding works best when applied lightly and regularly during active growth.

Regular feeding (maintenance): Mix with tap water according to the ratio on the label. For SUNSHINE Robusta use 25 ml (5 tsp)per gallon of water and spray leaves every 5-7 days during active growth.
Correction feeding ("medicine" dose): if plants show visible nutrient deficiencies, combine SUNSHINE Robusta with SUNSHINE Superfood and spray every 5–7 days until new growth appears healthy. All SUNSHINE Boosters products are compatible and can be mixed with water in the same sprayer.
Best time to spray: early morning or evening when temperatures are cooler and leaves can absorb nutrients efficiently.
Important: spray both the top and underside of leaves for maximum absorption.

Coffee plants before and after regular Sunshine Robusta applications

🛒 Feed your plants

Date: 27 Feb 2025

What Fertilizer to Use Now and How?
Five important keys to healthy plants

Q: It's early Spring this year. Should I start fertilizing my plants sooner than usual?

A: Most fertilizer instructions recommend fertilizing tropical plants from March to November. This is because plants don't need as much food during the cooler months when many go dormant, and excess nutrients can burn the roots if not absorbed. However, for the most effective fertilizer program and healthy plants, consider these points:

1. Sunshine Boosters Year-Round

Liquid amino-acid-based fertilizers like Sunshine Boosters are safe to use year-round. Since watering is reduced in cooler weather, the intake of water-soluble fertilizer is also lower, providing plants with just the essential nutrients for their minimal needs.

2. Dry Fertilizer Schedule

Be cautious with dry fertilizers. Apply them only during active growth in the hot season.

3. Temperature Is Key

If March is still cold, delay dry fertilizer use. However, if nighttime temperatures in February stay above 65F, you can start a dry fertilizer program using slow-release, granulated plant food.

4. What Fertilizers to Use and How

Check out our Sunshine Boosters selection for different types of plants and choose the right type for your needs. These can be applied as often as with every watering:

For Rapid Growth
Sunshine Robusta - Rapid Growth Booster: general fertilizer for both foliage plants and small starters that need an extra boost.

For Flowers
Sunshine Megaflor - Bloom Booster: boosts flowers on established plants; and Sunshine Pikake - Fragrant Plant Booster: best for fragrant flowers.

For Fruit Trees
Sunshine C-Cibus - Crop Booster: contains all necessary elements for fruit trees and their production. Sunshine Mango Tango - specifically formulated for Mango and Avocado trees, and Sunshine Citron - ideal for citrus trees.

For Tender Perennials
Sunshine Orchidasm - Orchid Total Feed and Sunshine Ananas - Pineapple and Bromeliad Booster: mild formulas for these tender perennials.

5. Microelement Supplements Are a Must

Besides macronutrients, plants need additional microelements, just like humans need vitamins. Be sure to apply these supplements along with your regular plant food:

For Green Leaves and Health
Sunshine SuperFood - Complex Microelement Supplement: a must for healthy plants. Apply once a month.

For Stress Relief
Sunshine-Epi - Brassinosteroid Plant Hormone: essential for plants recovering from stress (shipping, transplanting, drought, insect damage, cold stress, etc.). Apply as needed.

For Sweeter, Bigger Fruit
Sunshine Honey - Fruit Sugar Booster: application on fruit trees will make fruit bigger and sweeter by directing sugars to the fruit from other plant parts, and helps to prevent bud drop. Apply 4 times a year: at bud setting, flowering, fruit setting, and after harvesting.

For Better Resistance
Sunshine Power Si - Silicon Protector - enhances resistance to insects, diseases, drought, and frost, while boosting growth. Apply once a month, along with Sunshine SuperFood.

Need Help? Our Plant Experts Are Ready to Assist!

Shop Sunshine Boosters

Date: 26 Oct 2018

Improving cold hardiness before winter: fertilizer and micro-elements

Q: I live in New Jersey and it is getting cool here, with temperatures in the upper 40s, but my tropical plant collection is in a heated sunroom (still around 70s). Should I continue fertilizing my plants? And if yes, my second question about deciduous Sugar Apple tree. Should I continue fertilizing it until it drops leaves?

A: First of all, even though you live outside tropical climate, your plants enjoy warm temperatures year round, and can be treated like if they were in a Southern garden.
Plant nutrients, both macro-elements (regular fertilizer) and micro-elements (such as iron, manganese, magnesium, copper, and other elements) play an important role not only in overall plant health but also in plant hardiness.
The rule of thumb is, even in warm climates we cut off any fertilizer by the end of October. You still have time for the last treatment this year (next will be in March, or when your plants start showing new growth). You may apply just a bit of slow-release granulated fertilizer, or water-soluble by foliar spray, diluted 1/2 of label strength, to all evergreen species in your collection.
The most important application before winter is micro-elements and other plant boosters that will help you plant collection survive winter months with a shorter daylight and cooler temperatures. Now it is a perfect time to make these simple steps:

1) Miscro-element applications, any one of: Superfood, Iron Supplement, Greenleaf.
2) Sunshine-T application: for improving cold hardiness, plus immune system resistance to insects and deceases.
3) Sunshine-Honey application for all fruit trees to encourage bigger and sweeter fruit next year.

Regarding your second question. Deciduous tropical plants like Annonas, Adeniums, Plumerias, etc - do not need regular fertilizer at this time, however, go ahead and apply microelements Superfood complex, as well as Sunshine-Honey, while leaves are still green. These two will give a kick-start to provide better flowering in spring, and production of sweeter fruit later.

Check out SUNSHINE boosters - all with free shipping!

Date: 9 Sep 2019

How to make leaves green?

Q: I purchased several plants from you and they all arrived in great shape. The Wrightia is very large and vigorous but some leaves are yellowish. How can I improve that look? Any special fertilizer?

A: Wrightias are very showy and beautiful plants, although sometimes they are susceptible to leaf chlorosis which in other words is iron deficiency, especially during wet rainy weather. It is not harmful to the plant and can be corrected with microelement applications. Use Microelements once a week to correct the iron deficiency that usually goes away within a month. Then maintain plants health with monthly applications. It is beneficial to use microelements in combination with regular applications of health boosting fertilizer.