Jerusalem sage, learn to grow Phlomis fruticosa

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Fuzzy, felted leaves and beautiful yellow flowers on an evergreen shrub of about 5 feet: Jerusalem sage (Phlomis fruticosa) brings a Mediterranean air to dry, challenging spots, windswept beachfronts included. Give it light, well-drained soil, since it will not tolerate standing water, and once established it needs no watering at all.

Planting Phlomis fruticosa

You can plant Jerusalem sage, or Phlomis fruticosa, in either spring or fall, ideally in well-drained soil.Indeed, when planting Jerusalem sage, ensure your soil drains well because this plant hates standing water.

• Phlomis fruticosa loves sunny spots for a healthy bloom.
• Jerusalem sage doesn’t fear wind—in fact, it quite likes it!
• It absolutely needs light soil—try mixing soil with sand or pebbles.
• Space each plant a minimum of 3.3 feet (100 cm) apart, as Jerusalem sage quickly takes up space.
• Multiply with cuttings in summer.

• Established Jerusalem sage rarely needs watering, though it may appreciate a drink in prolonged drought; give a newly planted one an occasional deep soak through its first dry spell, since roots must reach down before the shrub can fend for itself.
• On heavy clay, set Phlomis fruticosa on a raised mound or gravel bed so its crown sits above the surrounding ground and winter wet drains away from the roots.
• There is no need to enrich the planting hole: Jerusalem sage (Phlomis fruticosa) thrives in lean, well-drained soil, and over-generous feeding tends to encourage soft, leggy growth rather than sturdy, compact plants.

Caring for Jerusalem sage

When it comes to upkeep, this plant is super easy to grow and barely needs any care. No need for watering once it’s established because it can survive without water for many long weeks.

Pruning Phlomis fruticosa, the Jerusalem sage

After blooming, cut it down by about half to maintain a compact shape and enhance next year’s blooms.

Jerusalem sage losing leaves in winter

• Trim any stems that have frozen and aren’t budding in the spring.

• Water a newly planted Jerusalem sage through its first dry summer until the roots spread into the surrounding soil; once established, the shrub is drought-tolerant and needs watering only in prolonged drought.
• When cutting back Phlomis fruticosa, most guidance advises keeping the secateurs within the leafy growth, the usual precaution for Mediterranean subshrubs, though reports differ on how reliably this species resprouts from old, bare wood.
• Jerusalem sage (Phlomis fruticosa), a Mediterranean shrub adapted to poor, well-drained soil, rarely needs feeding; gardeners commonly report that over-rich or heavily fed conditions encourage soft, lax growth rather than compact, free-flowering plants.
• For Phlomis fruticosa, the Mediterranean shrub commonly called Jerusalem sage, use gravel or crushed stone mulch rather than bark or compost, keeping the crown dry, since winter wet at the base is typically more damaging than cold.

Diseases on Phlomis fruticosa

Jerusalem sage, or Phlomis fruticosa, is a hardy plant, resistant to most diseases.

You may spot leafhoppers at the base of leaves, but it shouldn’t hinder growth or flowering of the Jerusalem sage.

• Phlomis fruticosa is generally trouble-free, but waterlogged or heavy soil is among its main threats because it encourages root rot, so improve drainage or plant on a slope or raised bed rather than relying on sprays.
• Mulch Jerusalem sage with gravel, grit or stone chippings instead of bark or compost, which hold damp against the woolly stem base and encourage rot at the collar.
• If you water a young Jerusalem sage, pour at the base rather than overhead, a standard precaution for woolly-leaved Mediterranean plants that keeps the felted foliage dry and reduces the risk of fungal problems.

Jerusalem sage year by year: what to do and when

Every job this shrub asks for is tied to a particular moment in the year. Use the table below to see at a glance what Phlomis fruticosa needs, and when.

Beyond these few moments, Jerusalem sage asks for almost nothing.

Need-to-know about Jerusalem sage

Gardeners after a named form can seek out ‘Amazone’, a selection of Phlomis fruticosa that brings the species’ yellow late spring to midsummer flowers and fuzzy evergreen leaves to the dry, windswept beachfront spots where the shrub needs no watering once established.

You can distinguish Jerusalem sage thanks to its fuzzy leaves, also known as bush sage or bushy phlomis.

The Jerusalem sage sprouts beautiful yellow flowers in the spring, creating a stunningly beautiful flowering bush.

Sharing the same family tree as thyme, basil, rosemary, and medicinal sage, Jerusalem sage traces its roots back to the Mediterranean.

It’s this plant’s hardiness and adaptability to dry and challenging areas, like beachfronts, that make us love Phlomis fruticosa. It’s worth noting, though, that while the Jerusalem sage is evergreen, it might shed its leaves in winter if it gets cold.