Soil & potting mix
Best soil for Principe Borghese Tomato (Solanum lycopersicum 'Principe Borghese')
Also called Principe Borghese tomato, Italian drying tomato.
More about principe borghese tomato
About Principe Borghese Tomato
Solanum lycopersicum 'Principe Borghese' · also called Principe Borghese tomato, Italian drying tomato · edible
Principe Borghese is an Italian determinate heirloom prized for sun-drying. It bears heavy clusters of small, dense, 30-40 g plum-shaped fruit with little juice and few seeds, concentrating flavour when dried. The compact bushy plants set a large, fairly concentrated crop and need only modest staking over a roughly 75-day season.
Preferred mix: Well-drained, fertile loam, pH 6.2-6.8
Watch for — Early blight: Concentric brown leaf spots in warm humid weather; mulch to stop soil splash, water low and remove lower leaves.
Why principe borghese tomato needs this mix
Principe Borghese Tomato is a hungry, thirsty crop — it wants a rich, moisture-retentive but free-draining loam, well fed and never baked dry.
- Principe Borghese Tomato grows fast and has a big crop to fill, so it draws heavily on both nutrients and water — a lean mix simply cannot keep up.
- Plenty of organic matter holds moisture evenly, which prevents the stress problems (bolting, bitterness, blossom-end rot) that come from a drying-then-flooding cycle.
- It still needs structure: rich does not mean airless, so grit, perlite or leaf mould keeps roots oxygenated.
For the full picture on what makes up a good mix, see our guide to the main types of soil and potting media — it explains why each ingredient above behaves the way it does.
What goes wrong with the wrong mix
The wrong soil is one of the most common reasons principe borghese tomato struggles, and the damage often shows up weeks later as a watering problem. For this species specifically:
- A poor, thin or sandy mix starves principe borghese tomato — growth stalls, leaves pale, and yields collapse.
- A heavy, compacted, badly drained soil rots the roots and brings fungal problems despite all the feeding.
- Letting a rich mix dry to dust then drowning it causes the classic moisture-stress disorders this crop is prone to.
Under-feeding and inconsistent moisture. Principe Borghese Tomato needs genuinely rich soil plus steady watering — most disappointing crops come down to one or both being short.
pH — does it matter for principe borghese tomato?
Principe Borghese Tomato does best around pH 6.0-7.0 (slightly acidic to neutral). It is worth a cheap soil test for an outdoor bed; very acidic soil benefits from a little lime well before planting.
If you want to check or adjust it, the soil pH guide walks through testing and the safe ways to nudge a mix more acidic or more alkaline.
DIY mix vs a bagged one
For containers a good multipurpose or vegetable compost works for principe borghese tomato with extra feed through the season. For beds, the real win is digging in plenty of well-rotted compost or manure — that beats any bag.
Drainage and the pot
Rich but free-draining is the target: raised beds and large containers both deliver it. Mulch heavily to even out moisture and roughly halve how often you water.
Principe Borghese Tomato is usually grown for a single season, so "repotting" means starting fresh each year — never reuse exhausted, disease-prone compost for the same crop family. When the time comes, our repotting guide for principe borghese tomato covers the timing and technique step by step.
Principe Borghese Tomato soil — frequently asked questions
What is the best soil mix for principe borghese tomato?
3 parts compost-amended loam or quality multipurpose compost : 1 part well-rotted garden compost or manure : 1 part perlite or grit (containers) / leaf mould (beds). Principe Borghese Tomato grows fast and has a big crop to fill, so it draws heavily on both nutrients and water — a lean mix simply cannot keep up.
Can I use normal potting soil for principe borghese tomato?
A poor, thin or sandy mix starves principe borghese tomato — growth stalls, leaves pale, and yields collapse. For containers a good multipurpose or vegetable compost works for principe borghese tomato with extra feed through the season. For beds, the real win is digging in plenty of well-rotted compost or manure — that beats any bag.
Does principe borghese tomato need a special pH?
Principe Borghese Tomato does best around pH 6.0-7.0 (slightly acidic to neutral). It is worth a cheap soil test for an outdoor bed; very acidic soil benefits from a little lime well before planting.
Should I buy a bagged mix or make my own for principe borghese tomato?
For containers a good multipurpose or vegetable compost works for principe borghese tomato with extra feed through the season. For beds, the real win is digging in plenty of well-rotted compost or manure — that beats any bag.
How often should I refresh the soil for principe borghese tomato?
Principe Borghese Tomato is usually grown for a single season, so "repotting" means starting fresh each year — never reuse exhausted, disease-prone compost for the same crop family. Rich but free-draining is the target: raised beds and large containers both deliver it. Mulch heavily to even out moisture and roughly halve how often you water.
Keep reading
- Principe Borghese Tomato care — the full brief (light, water, humidity, problems, pet safety)
- How often to water principe borghese tomato — the schedule the mix feeds into
- Repotting principe borghese tomato — when and how to refresh the mix
- Soil pH guide — test it and adjust it safely
- Should I water my plant? The simple check first
- Why is my plant wilting? Wet vs dry diagnosis
- Underwatered plant — signs and how to rehydrate it
- Best soil for tomato
- Best soil for pepper
- Best soil for cucumber
- All 3899 soil and potting-mix guides in the Growli library