Lunar Planting Calendar for August 2025

August marks the final stretch of summer. Days remain warm, but nights grow cooler. In the vegetable garden, crops are ripening, and in the orchard, it’s time to harvest apples and plums. But the season isn’t over yet! There’s still time for sowing, transplanting, plant care, and prepping for fall. To make the most of your efforts, consult the moon calendar gardening guide for August. The Moon influences sap flow, root development, and the growth of leaves and fruits. By aligning your work with its phases, you’ll avoid mistakes and save energy.

Moon Phases in August 2025

In August, the Moon goes through all four major phases, each influencing plants differently:

• First Quarter — August 1st
• Full Moon — August 9th
• Last Quarter — August 15th–16th
• New Moon — August 22nd–23rd
• Next First Quarter — August 30th–31st

Plant behavior by moon phase:

• Waxing Moon (New Moon to Full Moon): Ideal for planting upward-growing crops — greens, tomatoes, flowers.
• Waning Moon (Full Moon to New Moon): Best for root vegetables, transplanting, fertilizing.
• New Moon and Full Moon: Time to rest — avoid planting or sowing for 1–2 days.

What to Sow and Plant – Moon Calendar Gardening for August

Though summer is nearing its end, there’s still plenty to do. The lunar calendar for gardening in August recommends focusing on greens:

• Dill – Germinates quickly, cold-resistant
• Spinach – Ready to harvest in 3 weeks
• Arugula – Fragrant and tender, prefers mild warmth
• Cress – Sprouts in 3–5 days
• Leaf Mustard – Spicy and fast-growing
• Parsley – Thrives in cooler temperatures

Best Days to Sow Greens:

• 2nd–6th (Waxing Moon),
• 24th–28th (Waxing Moon resumes after New Moon).

Also, don’t forget about root vegetables:

• Radish – Better to sow now than in July; less bolting
• Winter Radish – Ideal for storage and salads
• Daikon – Delicate, juicy, prefers short days
• Beets – Choose only early varieties when sowing late in the season

Best Days to Sow Root Vegetables:

• 11th–14th (Waning Moon),
• 17th–20th (Pre-New Moon).

Transplanting Perennials — Moon Calendar Gardening in August

Late summer is perfect for updating perennial beds. The August moon calendar gardening recommends transplanting these:

• Strawberries – Transplant or plant new runners by mid-August to ensure rooting before fall
• Sorrel and Rhubarb – Divide and replant established clumps
• Welsh Onion, Shallots – Plant now for early spring greens

Best Days for Transplanting:

• 10th–14th (Waning Moon – supports root growth),
• 17th–20th (Downward energy, promotes root establishment).

Green Manure Crops — Moon Calendar for August Gardening

Late summer is ideal for sowing green manure crops (cover crops). These enrich the soil, suppress weeds, and add nitrogen.

Recommended Green Manure Crops:

• Mustard
• Phacelia
• Lupin
• Oats
• Rapeseed

Sow on beds vacated after harvesting early crops like potatoes, cucumbers, peas, or early cabbage.

Best Days for Sowing Green Manure:

• 2nd–6th (Vigorous growth),
• 24th–28th (New lunar cycle begins).

Garden Work — August Lunar Calendar for Gardening

At summer’s end, the garden needs extra care. The moon calendar gardening guide for August highlights key seasonal tasks:

Pruning:

• Raspberries – Remove old canes after fruiting
• Currants & Gooseberries – Shape shrubs by cutting weak branches
• Apples & Pears – Lightly thin crowns, remove dry branches

Best Days for Pruning: 15th–20th (Waning Moon — less sap flow = less stress)

After fruiting, trees and shrubs are exhausted and need support:

• Phosphorus-Potassium Fertilizers – Help prepare for winter
• Wood Ash – Natural potassium source
• Compost – Spread in tree circles

Avoid nitrogen in August — it promotes growth when plants need to rest.

Best Days for Fertilizing: 9th–12th (Full Moon and after — high sap activity = better nutrient absorption)

Late summer brings outbreaks of fungus and caterpillars. Watch for:

• Codling moth (apples)
• Powdery mildew
• Rot on grapes, plums, tomatoes

Use biological treatments (infusions, ash, whey) or permitted fungicides. Remove infected fruits — don’t leave them on the ground.

Best Days for Treatment: 13th–18th (Waning Moon — pest control is most effective)

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Harvesting — Moon Calendar Gardening for August 2025

August is the most bountiful month. Gardens and orchards are full of ripe produce — it’s important to harvest at the right time.

What to Harvest in August:

• Tomatoes, cucumbers, peppers – Harvest frequently to encourage new growth
• Onions and garlic – Dig when tops start to dry
• Potatoes – Harvest as they mature, especially after vines die down
• Zucchini, eggplant, pumpkins – Pick regularly before they overripen
• Apples, pears, plums – Harvest in the morning or evening when it’s cool

Best Days for Harvesting:

• 9th–13th (Full Moon and after — juices are concentrated),
• 29th–31st (Waxing Moon — fruits are sweet and juicy).

Late August is peak season for home preserving. Popular items:

• Cucumbers – Pickled or fermented
• Tomatoes – Juice, ajika, lecho
• Peppers – Frozen or stuffed
• Zucchini – Purees, frozen slices
• Fruits & Berries – Jam, preserves, compotes
• Herbs – Dried or frozen
  

Best Days for Preserving:

• 8th–13th (Full Moon and waning phase — flavor and juice are highest),
• 27th–31st (New lunar cycle boosts flavor accumulation).

Conclusion

Late summer is a busy time in the garden, but with the moon calendar gardening guide for August, everything can be done efficiently and at the right time. The key is to stay attuned to nature, work in harmony with the Moon’s rhythm — and don’t forget to rest! That’s how your garden will reward you with an abundant harvest.

Frequently Asked Questions

When should I sow cucumbers in August 2025?

It’s best to sow cucumbers at the beginning of the month. Ideal days: August 2nd–6th, during the Waxing Moon. Plants will grow quickly and fruit well.

When should I transplant flowers in August 2025?

Transplant flowers in the second half of the month. Ideal days: August 10th–14th or 17th–20th, when the Moon is waning. Roots establish better during this time.