Compost and Fertilizing: The Complete Guide to Fertilizing Plants in the Israeli Summer
The Israeli summer is peak growing season—and proper fertilization can double your blooms. But incorrect fertilization will cause damage. Here is everything you need to know.
Every gardener who has done it once knows the feeling: A potted plant that looks "tired," yellow leaves despite regular watering, and blooms that simply never arrive. The reason is usually not a lack of water, but a lack of nutrients. In the summer, when plants grow at a rapid pace, they deplete soil reserves quickly. Proper fertilization is the fuel that moves them forward.
Why is summer the golden season for fertilization?
Plants require fertilization primarily during active growth—and in Israel, summer (May through September) is the peak of the growing season. High temperatures, long days, and direct sunlight trigger growth mechanisms at full power. During this period, the plant consumes nitrogen, phosphorus, and potassium—the three main macronutrients—at a rate twice as high as in winter.
Therefore, effective fertilization in summer is not an "extra"—it is essential for plant health. Conversely, excessive fertilization during the heat of the day can burn roots and cause irreversible damage.
Compost vs. chemical fertilizer — what's the difference and which is better?
There are two main approaches to fertilizing gardens and potted plants:
- Organic compost — Decomposed plant and animal matter; releases nutrients slowly and in a controlled manner. Enriches the soil with beneficial bacteria, improves texture, and retains moisture better.
- Chemical (mineral) fertilizer — Releases nutrients quickly; suitable for immediate feeding. However, it can deplete the soil over time and harm soil organisms.
- Ideal combination: Organic compost as a base for soil fertility + water-diluted liquid fertilizer throughout the summer = maximum results.
For effective organic fertilization suitable for all plants—Green Compost 25L fertilizer compost:
100% Organic Compost
Green Compost 25L Fertilizer Bag
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Perlite and LECA balls: how to improve fertilization efficiency
It is not enough to just add fertilizer—the soil itself must be in a "receptive state" for nutrients to reach the roots. Two materials that dramatically improve fertilizer absorption:
- Perlite — Lightweight white particles that aerate the soil and prevent compaction. When soil is aerated, compost-decomposing bacteria are more active, and roots absorb nutrients with higher efficiency.
- LECA balls (clay pebbles) — Expanded clay balls for a drainage layer at the bottom of the pot. Prevent waterlogging and root rot, ensuring the fertilizer reaches the roots and isn't washed away.
For aeration and better absorption
Perlite
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For ideal drainage
LECA Balls
From ₪14
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For more on improving growing media: The complete guide to perlite, coconut coir, and tuff.
5 steps to correct fertilization in summer
- Water before fertilizing: Moist soil absorbs fertilizer better than dry soil. Water 24 hours before, or fertilize the morning after evening watering.
- Fertilize during the cool hours: Early morning or evening—not at midday with 35°C+ heat. High heat accelerates evaporation and increases the risk of root burn.
- Measure exact amounts: "A little more = better" is not true for fertilization. Excess nitrogen leads to foliage only and poor blooming. Follow the manufacturer's instructions.
- Add compost as a top dressing: 2–3 cm of compost on the soil surface, not mixed in—this way it releases nutrients slowly with every watering.
- Reduce at the end of summer: In August–September, reduce the dosage, and in October stop completely. Prepare the plant for winter dormancy.
Organic compost added before the first morning watering is the best way to ensure slow and controlled fertilization in the summer. The plant receives food at a rate it can digest, without a sudden overload.
Which plants benefit most from summer fertilization?
Not all plants have the same fertilization requirements. Here is who benefits the most:
- Flowering plants such as Kalanchoe, Geranium, and Petunia—the hungriest for potassium for abundant, rich summer blooms.
- Vegetables and herbs—grow quickly and require high amounts of nitrogen.
- Fruit trees—phosphorus for strengthening roots and potassium for fruit quality.
- Houseplants—minimal fertilization; once a month with diluted liquid fertilizer is enough.
- Succulents and cacti—barely need any. Once a quarter, highly diluted.
Benefits from summer fertilization
Perennial Kalanchoe for home and garden
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For the garden soil itself—an aerated and rich planting mix is the foundation for effective fertilization. See our guide to choosing a planting mix.
Excellent basis for fertilization
80L planting mix from Northern grower
₪65
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"A plant that grows in rich soil doesn't need to work hard searching for food—it can dedicate all its energy to blooming." — Deco Garden Team
Frequently Asked Questions about Fertilization
What is the difference between compost and garden soil?
Garden soil (planting mix) is the medium where the plant grows—it provides structure, drainage, and moisture. Compost is an organic nutrient additive that you add to the soil to improve fertility. One cannot replace the other.
How often should I fertilize in the summer?
For most plants: Compost once a month as a top dressing + diluted liquid fertilizer once every two weeks. For succulents and houseplants—once a month with highly diluted fertilizer is enough.
Can I fertilize after pruning?
Yes, it is even recommended! Pruning stimulates new growth, and fertilization immediately afterward provides the energy for that growth. Wait 48 hours and then fertilize with a balanced fertilizer.
What happens if I over-fertilize?
Excess fertilizer—especially nitrogen—causes "root burn": yellow or brown leaves at the tips, and in extreme cases, the death of the plant. It is always better to have too little than too much.
Is homemade compost enough for the garden?
Homemade compost is excellent but often doesn't reach full maturity. Commercial compost like Green Compost has undergone a controlled process and provides known, uniform nutrient values.
Key takeaways
- Summer = Fertilization season—plants grow fast and are hungry for nutrients.
- Organic compost + perlite = A winning combination for fertile, aerated soil.
- Fertilize in the early morning or evening—never at midday during the peak heat.
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